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@@ -1,922 +1,920 b'' | |||
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1 | 1 | #!/usr/bin/env python |
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2 | 2 | """A simple interactive kernel that talks to a frontend over 0MQ. |
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3 | 3 | |
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4 | 4 | Things to do: |
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5 | 5 | |
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6 | 6 | * Implement `set_parent` logic. Right before doing exec, the Kernel should |
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7 | 7 | call set_parent on all the PUB objects with the message about to be executed. |
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8 | 8 | * Implement random port and security key logic. |
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9 | 9 | * Implement control messages. |
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10 | 10 | * Implement event loop and poll version. |
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11 | 11 | """ |
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12 | 12 | |
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13 | 13 | #----------------------------------------------------------------------------- |
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14 | 14 | # Imports |
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15 | 15 | #----------------------------------------------------------------------------- |
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16 | 16 | from __future__ import print_function |
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17 | 17 | |
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18 | 18 | # Standard library imports |
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19 | 19 | import __builtin__ |
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20 | 20 | import atexit |
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21 | 21 | import sys |
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22 | 22 | import time |
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23 | 23 | import traceback |
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24 | 24 | import logging |
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25 | 25 | import uuid |
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26 | 26 | |
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27 | 27 | from datetime import datetime |
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28 | 28 | from signal import ( |
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29 | 29 | signal, getsignal, default_int_handler, SIGINT, SIG_IGN |
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30 | 30 | ) |
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31 | 31 | |
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32 | 32 | # System library imports |
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33 | 33 | import zmq |
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34 | 34 | from zmq.eventloop import ioloop |
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35 | 35 | from zmq.eventloop.zmqstream import ZMQStream |
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36 | 36 | |
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37 | 37 | # Local imports |
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38 | 38 | from IPython.config.configurable import Configurable |
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39 | 39 | from IPython.config.application import boolean_flag, catch_config_error |
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40 | 40 | from IPython.core.application import ProfileDir |
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41 | 41 | from IPython.core.error import StdinNotImplementedError |
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42 | 42 | from IPython.core.shellapp import ( |
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43 | 43 | InteractiveShellApp, shell_flags, shell_aliases |
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44 | 44 | ) |
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45 | 45 | from IPython.utils import io |
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46 | 46 | from IPython.utils import py3compat |
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47 | 47 | from IPython.utils.frame import extract_module_locals |
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48 | 48 | from IPython.utils.jsonutil import json_clean |
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49 | 49 | from IPython.utils.traitlets import ( |
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50 | 50 | Any, Instance, Float, Dict, CaselessStrEnum, List, Set, Integer, Unicode |
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51 | 51 | ) |
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52 | 52 | |
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53 | 53 | from entry_point import base_launch_kernel |
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54 | 54 | from kernelapp import KernelApp, kernel_flags, kernel_aliases |
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55 | 55 | from serialize import serialize_object, unpack_apply_message |
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56 | 56 | from session import Session, Message |
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57 | 57 | from zmqshell import ZMQInteractiveShell |
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58 | 58 | |
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59 | 59 | |
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60 | 60 | #----------------------------------------------------------------------------- |
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61 | 61 | # Main kernel class |
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62 | 62 | #----------------------------------------------------------------------------- |
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63 | 63 | |
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64 | 64 | class Kernel(Configurable): |
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65 | 65 | |
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66 | 66 | #--------------------------------------------------------------------------- |
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67 | 67 | # Kernel interface |
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68 | 68 | #--------------------------------------------------------------------------- |
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69 | 69 | |
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70 | 70 | # attribute to override with a GUI |
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71 | 71 | eventloop = Any(None) |
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72 | 72 | def _eventloop_changed(self, name, old, new): |
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73 | 73 | """schedule call to eventloop from IOLoop""" |
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74 | 74 | loop = ioloop.IOLoop.instance() |
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75 | 75 | loop.add_timeout(time.time()+0.1, self.enter_eventloop) |
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76 | 76 | |
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77 | 77 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
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78 | 78 | session = Instance(Session) |
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79 | 79 | profile_dir = Instance('IPython.core.profiledir.ProfileDir') |
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80 | 80 | shell_streams = List() |
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81 | 81 | control_stream = Instance(ZMQStream) |
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82 | 82 | iopub_socket = Instance(zmq.Socket) |
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83 | 83 | stdin_socket = Instance(zmq.Socket) |
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84 | 84 | log = Instance(logging.Logger) |
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85 | 85 | |
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86 | 86 | user_module = Any() |
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87 | 87 | def _user_module_changed(self, name, old, new): |
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88 | 88 | if self.shell is not None: |
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89 | 89 | self.shell.user_module = new |
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90 | 90 | |
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91 | 91 | user_ns = Dict(default_value=None) |
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92 | 92 | def _user_ns_changed(self, name, old, new): |
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93 | 93 | if self.shell is not None: |
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94 | 94 | self.shell.user_ns = new |
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95 | 95 | self.shell.init_user_ns() |
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96 | 96 | |
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97 | 97 | # identities: |
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98 | 98 | int_id = Integer(-1) |
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99 | 99 | ident = Unicode() |
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100 | 100 | |
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101 | 101 | def _ident_default(self): |
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102 | 102 | return unicode(uuid.uuid4()) |
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103 | 103 | |
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104 | 104 | |
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105 | 105 | # Private interface |
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106 | 106 | |
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107 | 107 | # Time to sleep after flushing the stdout/err buffers in each execute |
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108 | 108 | # cycle. While this introduces a hard limit on the minimal latency of the |
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109 | 109 | # execute cycle, it helps prevent output synchronization problems for |
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110 | 110 | # clients. |
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111 | 111 | # Units are in seconds. The minimum zmq latency on local host is probably |
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112 | 112 | # ~150 microseconds, set this to 500us for now. We may need to increase it |
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113 | 113 | # a little if it's not enough after more interactive testing. |
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114 | 114 | _execute_sleep = Float(0.0005, config=True) |
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115 | 115 | |
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116 | 116 | # Frequency of the kernel's event loop. |
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117 | 117 | # Units are in seconds, kernel subclasses for GUI toolkits may need to |
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118 | 118 | # adapt to milliseconds. |
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119 | 119 | _poll_interval = Float(0.05, config=True) |
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120 | 120 | |
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121 | 121 | # If the shutdown was requested over the network, we leave here the |
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122 | 122 | # necessary reply message so it can be sent by our registered atexit |
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123 | 123 | # handler. This ensures that the reply is only sent to clients truly at |
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124 | 124 | # the end of our shutdown process (which happens after the underlying |
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125 | 125 | # IPython shell's own shutdown). |
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126 | 126 | _shutdown_message = None |
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127 | 127 | |
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128 | 128 | # This is a dict of port number that the kernel is listening on. It is set |
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129 | 129 | # by record_ports and used by connect_request. |
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130 | 130 | _recorded_ports = Dict() |
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131 | 131 | |
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132 | 132 | # set of aborted msg_ids |
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133 | 133 | aborted = Set() |
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134 | 134 | |
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135 | 135 | |
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136 | 136 | def __init__(self, **kwargs): |
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137 | 137 | super(Kernel, self).__init__(**kwargs) |
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138 | 138 | |
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139 | 139 | # Initialize the InteractiveShell subclass |
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140 | 140 | self.shell = ZMQInteractiveShell.instance(config=self.config, |
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141 | 141 | profile_dir = self.profile_dir, |
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142 | 142 | user_module = self.user_module, |
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143 | 143 | user_ns = self.user_ns, |
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144 | 144 | ) |
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145 | 145 | self.shell.displayhook.session = self.session |
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146 | 146 | self.shell.displayhook.pub_socket = self.iopub_socket |
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147 | 147 | self.shell.displayhook.topic = self._topic('pyout') |
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148 | 148 | self.shell.display_pub.session = self.session |
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149 | 149 | self.shell.display_pub.pub_socket = self.iopub_socket |
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150 | 150 | |
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151 | 151 | # TMP - hack while developing |
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152 | 152 | self.shell._reply_content = None |
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153 | 153 | |
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154 | 154 | # Build dict of handlers for message types |
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155 | 155 | msg_types = [ 'execute_request', 'complete_request', |
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156 | 156 | 'object_info_request', 'history_request', |
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157 | 157 | 'connect_request', 'shutdown_request', |
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158 | 158 | 'apply_request', |
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159 | 159 | ] |
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160 | 160 | self.shell_handlers = {} |
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161 | 161 | for msg_type in msg_types: |
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162 | 162 | self.shell_handlers[msg_type] = getattr(self, msg_type) |
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163 | 163 | |
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164 | 164 | control_msg_types = msg_types + [ 'clear_request', 'abort_request' ] |
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165 | 165 | self.control_handlers = {} |
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166 | 166 | for msg_type in control_msg_types: |
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167 | 167 | self.control_handlers[msg_type] = getattr(self, msg_type) |
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168 | 168 | |
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169 | 169 | def dispatch_control(self, msg): |
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170 | 170 | """dispatch control requests""" |
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171 | 171 | idents,msg = self.session.feed_identities(msg, copy=False) |
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172 | 172 | try: |
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173 | 173 | msg = self.session.unserialize(msg, content=True, copy=False) |
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174 | 174 | except: |
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175 | 175 | self.log.error("Invalid Control Message", exc_info=True) |
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176 | 176 | return |
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177 | 177 | |
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178 | 178 | self.log.debug("Control received: %s", msg) |
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179 | 179 | |
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180 | 180 | header = msg['header'] |
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181 | 181 | msg_id = header['msg_id'] |
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182 | 182 | msg_type = header['msg_type'] |
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183 | 183 | |
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184 | 184 | handler = self.control_handlers.get(msg_type, None) |
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185 | 185 | if handler is None: |
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186 | 186 | self.log.error("UNKNOWN CONTROL MESSAGE TYPE: %r", msg_type) |
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187 | 187 | else: |
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188 | 188 | try: |
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189 | 189 | handler(self.control_stream, idents, msg) |
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190 | 190 | except Exception: |
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191 | 191 | self.log.error("Exception in control handler:", exc_info=True) |
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192 | 192 | |
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193 | 193 | def dispatch_shell(self, stream, msg): |
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194 | 194 | """dispatch shell requests""" |
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195 | 195 | # flush control requests first |
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196 | 196 | if self.control_stream: |
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197 | 197 | self.control_stream.flush() |
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198 | 198 | |
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199 | 199 | idents,msg = self.session.feed_identities(msg, copy=False) |
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200 | 200 | try: |
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201 | 201 | msg = self.session.unserialize(msg, content=True, copy=False) |
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202 | 202 | except: |
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203 | 203 | self.log.error("Invalid Message", exc_info=True) |
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204 | 204 | return |
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205 | 205 | |
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206 | 206 | header = msg['header'] |
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207 | 207 | msg_id = header['msg_id'] |
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208 | 208 | msg_type = msg['header']['msg_type'] |
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209 | 209 | |
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210 | 210 | # Print some info about this message and leave a '--->' marker, so it's |
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211 | 211 | # easier to trace visually the message chain when debugging. Each |
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212 | 212 | # handler prints its message at the end. |
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213 | 213 | self.log.debug('\n*** MESSAGE TYPE:%s***', msg_type) |
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214 | 214 | self.log.debug(' Content: %s\n --->\n ', msg['content']) |
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215 | 215 | |
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216 | 216 | if msg_id in self.aborted: |
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217 | 217 | self.aborted.remove(msg_id) |
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218 | 218 | # is it safe to assume a msg_id will not be resubmitted? |
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219 | 219 | reply_type = msg_type.split('_')[0] + '_reply' |
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220 | 220 | status = {'status' : 'aborted'} |
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221 | 221 | sub = {'engine' : self.ident} |
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222 | 222 | sub.update(status) |
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223 | 223 | reply_msg = self.session.send(stream, reply_type, subheader=sub, |
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224 | 224 | content=status, parent=msg, ident=idents) |
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225 | 225 | return |
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226 | 226 | |
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227 | 227 | handler = self.shell_handlers.get(msg_type, None) |
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228 | 228 | if handler is None: |
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229 | 229 | self.log.error("UNKNOWN MESSAGE TYPE: %r", msg_type) |
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230 | 230 | else: |
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231 | 231 | # ensure default_int_handler during handler call |
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232 | 232 | sig = signal(SIGINT, default_int_handler) |
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233 | 233 | try: |
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234 | 234 | handler(stream, idents, msg) |
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235 | 235 | except Exception: |
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236 | 236 | self.log.error("Exception in message handler:", exc_info=True) |
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237 | 237 | finally: |
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238 | 238 | signal(SIGINT, sig) |
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239 | 239 | |
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240 | 240 | def enter_eventloop(self): |
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241 | 241 | """enter eventloop""" |
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242 | 242 | self.log.info("entering eventloop") |
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243 | 243 | # restore default_int_handler |
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244 | 244 | signal(SIGINT, default_int_handler) |
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245 | 245 | while self.eventloop is not None: |
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246 | 246 | try: |
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247 | 247 | self.eventloop(self) |
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248 | 248 | except KeyboardInterrupt: |
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249 | 249 | # Ctrl-C shouldn't crash the kernel |
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250 | 250 | self.log.error("KeyboardInterrupt caught in kernel") |
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251 | 251 | continue |
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252 | 252 | else: |
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253 | 253 | # eventloop exited cleanly, this means we should stop (right?) |
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254 | 254 | self.eventloop = None |
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255 | 255 | break |
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256 | 256 | self.log.info("exiting eventloop") |
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257 | # if eventloop exits, IOLoop should stop | |
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258 | ioloop.IOLoop.instance().stop() | |
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259 | 257 | |
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260 | 258 | def start(self): |
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261 | 259 | """register dispatchers for streams""" |
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262 | 260 | self.shell.exit_now = False |
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263 | 261 | if self.control_stream: |
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264 | 262 | self.control_stream.on_recv(self.dispatch_control, copy=False) |
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265 | 263 | |
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266 | 264 | def make_dispatcher(stream): |
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267 | 265 | def dispatcher(msg): |
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268 | 266 | return self.dispatch_shell(stream, msg) |
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269 | 267 | return dispatcher |
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270 | 268 | |
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271 | 269 | for s in self.shell_streams: |
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272 | 270 | s.on_recv(make_dispatcher(s), copy=False) |
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273 | 271 | |
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274 | 272 | def do_one_iteration(self): |
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275 | 273 | """step eventloop just once""" |
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276 | 274 | if self.control_stream: |
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277 | 275 | self.control_stream.flush() |
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278 | 276 | for stream in self.shell_streams: |
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279 | 277 | # handle at most one request per iteration |
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280 | 278 | stream.flush(zmq.POLLIN, 1) |
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281 | 279 | stream.flush(zmq.POLLOUT) |
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282 | 280 | |
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283 | 281 | |
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284 | 282 | def record_ports(self, ports): |
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285 | 283 | """Record the ports that this kernel is using. |
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286 | 284 | |
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287 | 285 | The creator of the Kernel instance must call this methods if they |
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288 | 286 | want the :meth:`connect_request` method to return the port numbers. |
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289 | 287 | """ |
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290 | 288 | self._recorded_ports = ports |
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291 | 289 | |
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292 | 290 | #--------------------------------------------------------------------------- |
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293 | 291 | # Kernel request handlers |
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294 | 292 | #--------------------------------------------------------------------------- |
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295 | 293 | |
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296 | 294 | def _make_subheader(self): |
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297 | 295 | """init subheader dict, for execute/apply_reply""" |
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298 | 296 | return { |
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299 | 297 | 'dependencies_met' : True, |
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300 | 298 | 'engine' : self.ident, |
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301 | 299 | 'started': datetime.now(), |
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302 | 300 | } |
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303 | 301 | |
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304 | 302 | def _publish_pyin(self, code, parent, execution_count): |
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305 | 303 | """Publish the code request on the pyin stream.""" |
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306 | 304 | |
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307 | 305 | self.session.send(self.iopub_socket, u'pyin', |
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308 | 306 | {u'code':code, u'execution_count': execution_count}, |
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309 | 307 | parent=parent, ident=self._topic('pyin') |
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310 | 308 | ) |
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311 | 309 | |
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312 | 310 | def _publish_status(self, status, parent=None): |
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313 | 311 | """send status (busy/idle) on IOPub""" |
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314 | 312 | self.session.send(self.iopub_socket, |
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315 | 313 | u'status', |
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316 | 314 | {u'execution_state': status}, |
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317 | 315 | parent=parent, |
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318 | 316 | ident=self._topic('status'), |
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319 | 317 | ) |
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320 | 318 | |
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321 | 319 | |
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322 | 320 | def execute_request(self, stream, ident, parent): |
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323 | 321 | """handle an execute_request""" |
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324 | 322 | |
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325 | 323 | self._publish_status(u'busy', parent) |
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326 | 324 | |
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327 | 325 | try: |
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328 | 326 | content = parent[u'content'] |
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329 | 327 | code = content[u'code'] |
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330 | 328 | silent = content[u'silent'] |
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331 | 329 | except: |
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332 | 330 | self.log.error("Got bad msg: ") |
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333 | 331 | self.log.error("%s", parent) |
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334 | 332 | return |
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335 | 333 | |
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336 | 334 | sub = self._make_subheader() |
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337 | 335 | |
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338 | 336 | shell = self.shell # we'll need this a lot here |
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339 | 337 | |
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340 | 338 | # Replace raw_input. Note that is not sufficient to replace |
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341 | 339 | # raw_input in the user namespace. |
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342 | 340 | if content.get('allow_stdin', False): |
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343 | 341 | raw_input = lambda prompt='': self._raw_input(prompt, ident, parent) |
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344 | 342 | else: |
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345 | 343 | raw_input = lambda prompt='' : self._no_raw_input() |
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346 | 344 | |
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347 | 345 | if py3compat.PY3: |
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348 | 346 | __builtin__.input = raw_input |
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349 | 347 | else: |
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350 | 348 | __builtin__.raw_input = raw_input |
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351 | 349 | |
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352 | 350 | # Set the parent message of the display hook and out streams. |
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353 | 351 | shell.displayhook.set_parent(parent) |
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354 | 352 | shell.display_pub.set_parent(parent) |
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355 | 353 | sys.stdout.set_parent(parent) |
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356 | 354 | sys.stderr.set_parent(parent) |
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357 | 355 | |
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358 | 356 | # Re-broadcast our input for the benefit of listening clients, and |
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359 | 357 | # start computing output |
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360 | 358 | if not silent: |
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361 | 359 | self._publish_pyin(code, parent, shell.execution_count) |
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362 | 360 | |
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363 | 361 | reply_content = {} |
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364 | 362 | try: |
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365 | 363 | # FIXME: the shell calls the exception handler itself. |
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366 | 364 | shell.run_cell(code, store_history=not silent, silent=silent) |
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367 | 365 | except: |
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368 | 366 | status = u'error' |
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369 | 367 | # FIXME: this code right now isn't being used yet by default, |
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370 | 368 | # because the run_cell() call above directly fires off exception |
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371 | 369 | # reporting. This code, therefore, is only active in the scenario |
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372 | 370 | # where runlines itself has an unhandled exception. We need to |
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373 | 371 | # uniformize this, for all exception construction to come from a |
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374 | 372 | # single location in the codbase. |
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375 | 373 | etype, evalue, tb = sys.exc_info() |
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376 | 374 | tb_list = traceback.format_exception(etype, evalue, tb) |
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377 | 375 | reply_content.update(shell._showtraceback(etype, evalue, tb_list)) |
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378 | 376 | else: |
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379 | 377 | status = u'ok' |
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380 | 378 | |
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381 | 379 | reply_content[u'status'] = status |
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382 | 380 | |
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383 | 381 | # Return the execution counter so clients can display prompts |
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384 | 382 | reply_content['execution_count'] = shell.execution_count - 1 |
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385 | 383 | |
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386 | 384 | # FIXME - fish exception info out of shell, possibly left there by |
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387 | 385 | # runlines. We'll need to clean up this logic later. |
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388 | 386 | if shell._reply_content is not None: |
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389 | 387 | reply_content.update(shell._reply_content) |
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390 | 388 | e_info = dict(engine_uuid=self.ident, engine_id=self.int_id, method='execute') |
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391 | 389 | reply_content['engine_info'] = e_info |
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392 | 390 | # reset after use |
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393 | 391 | shell._reply_content = None |
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394 | 392 | |
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395 | 393 | # At this point, we can tell whether the main code execution succeeded |
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396 | 394 | # or not. If it did, we proceed to evaluate user_variables/expressions |
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397 | 395 | if reply_content['status'] == 'ok': |
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398 | 396 | reply_content[u'user_variables'] = \ |
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399 | 397 | shell.user_variables(content.get(u'user_variables', [])) |
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400 | 398 | reply_content[u'user_expressions'] = \ |
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401 | 399 | shell.user_expressions(content.get(u'user_expressions', {})) |
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402 | 400 | else: |
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403 | 401 | # If there was an error, don't even try to compute variables or |
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404 | 402 | # expressions |
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405 | 403 | reply_content[u'user_variables'] = {} |
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406 | 404 | reply_content[u'user_expressions'] = {} |
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407 | 405 | |
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408 | 406 | # Payloads should be retrieved regardless of outcome, so we can both |
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409 | 407 | # recover partial output (that could have been generated early in a |
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410 | 408 | # block, before an error) and clear the payload system always. |
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411 | 409 | reply_content[u'payload'] = shell.payload_manager.read_payload() |
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412 | 410 | # Be agressive about clearing the payload because we don't want |
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413 | 411 | # it to sit in memory until the next execute_request comes in. |
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414 | 412 | shell.payload_manager.clear_payload() |
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415 | 413 | |
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416 | 414 | # Flush output before sending the reply. |
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417 | 415 | sys.stdout.flush() |
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418 | 416 | sys.stderr.flush() |
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419 | 417 | # FIXME: on rare occasions, the flush doesn't seem to make it to the |
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420 | 418 | # clients... This seems to mitigate the problem, but we definitely need |
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421 | 419 | # to better understand what's going on. |
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422 | 420 | if self._execute_sleep: |
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423 | 421 | time.sleep(self._execute_sleep) |
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424 | 422 | |
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425 | 423 | # Send the reply. |
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426 | 424 | reply_content = json_clean(reply_content) |
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427 | 425 | |
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428 | 426 | sub['status'] = reply_content['status'] |
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429 | 427 | if reply_content['status'] == 'error' and \ |
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430 | 428 | reply_content['ename'] == 'UnmetDependency': |
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431 | 429 | sub['dependencies_met'] = False |
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432 | 430 | |
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433 | 431 | reply_msg = self.session.send(stream, u'execute_reply', |
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434 | 432 | reply_content, parent, subheader=sub, |
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435 | 433 | ident=ident) |
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436 | 434 | |
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437 | 435 | self.log.debug("%s", reply_msg) |
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438 | 436 | |
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439 | 437 | if not silent and reply_msg['content']['status'] == u'error': |
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440 | 438 | self._abort_queues() |
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441 | 439 | |
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442 | 440 | self._publish_status(u'idle', parent) |
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443 | 441 | |
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444 | 442 | def complete_request(self, stream, ident, parent): |
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445 | 443 | txt, matches = self._complete(parent) |
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446 | 444 | matches = {'matches' : matches, |
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447 | 445 | 'matched_text' : txt, |
|
448 | 446 | 'status' : 'ok'} |
|
449 | 447 | matches = json_clean(matches) |
|
450 | 448 | completion_msg = self.session.send(stream, 'complete_reply', |
|
451 | 449 | matches, parent, ident) |
|
452 | 450 | self.log.debug("%s", completion_msg) |
|
453 | 451 | |
|
454 | 452 | def object_info_request(self, stream, ident, parent): |
|
455 | 453 | content = parent['content'] |
|
456 | 454 | object_info = self.shell.object_inspect(content['oname'], |
|
457 | 455 | detail_level = content.get('detail_level', 0) |
|
458 | 456 | ) |
|
459 | 457 | # Before we send this object over, we scrub it for JSON usage |
|
460 | 458 | oinfo = json_clean(object_info) |
|
461 | 459 | msg = self.session.send(stream, 'object_info_reply', |
|
462 | 460 | oinfo, parent, ident) |
|
463 | 461 | self.log.debug("%s", msg) |
|
464 | 462 | |
|
465 | 463 | def history_request(self, stream, ident, parent): |
|
466 | 464 | # We need to pull these out, as passing **kwargs doesn't work with |
|
467 | 465 | # unicode keys before Python 2.6.5. |
|
468 | 466 | hist_access_type = parent['content']['hist_access_type'] |
|
469 | 467 | raw = parent['content']['raw'] |
|
470 | 468 | output = parent['content']['output'] |
|
471 | 469 | if hist_access_type == 'tail': |
|
472 | 470 | n = parent['content']['n'] |
|
473 | 471 | hist = self.shell.history_manager.get_tail(n, raw=raw, output=output, |
|
474 | 472 | include_latest=True) |
|
475 | 473 | |
|
476 | 474 | elif hist_access_type == 'range': |
|
477 | 475 | session = parent['content']['session'] |
|
478 | 476 | start = parent['content']['start'] |
|
479 | 477 | stop = parent['content']['stop'] |
|
480 | 478 | hist = self.shell.history_manager.get_range(session, start, stop, |
|
481 | 479 | raw=raw, output=output) |
|
482 | 480 | |
|
483 | 481 | elif hist_access_type == 'search': |
|
484 | 482 | pattern = parent['content']['pattern'] |
|
485 | 483 | hist = self.shell.history_manager.search(pattern, raw=raw, |
|
486 | 484 | output=output) |
|
487 | 485 | |
|
488 | 486 | else: |
|
489 | 487 | hist = [] |
|
490 | 488 | hist = list(hist) |
|
491 | 489 | content = {'history' : hist} |
|
492 | 490 | content = json_clean(content) |
|
493 | 491 | msg = self.session.send(stream, 'history_reply', |
|
494 | 492 | content, parent, ident) |
|
495 | 493 | self.log.debug("Sending history reply with %i entries", len(hist)) |
|
496 | 494 | |
|
497 | 495 | def connect_request(self, stream, ident, parent): |
|
498 | 496 | if self._recorded_ports is not None: |
|
499 | 497 | content = self._recorded_ports.copy() |
|
500 | 498 | else: |
|
501 | 499 | content = {} |
|
502 | 500 | msg = self.session.send(stream, 'connect_reply', |
|
503 | 501 | content, parent, ident) |
|
504 | 502 | self.log.debug("%s", msg) |
|
505 | 503 | |
|
506 | 504 | def shutdown_request(self, stream, ident, parent): |
|
507 | 505 | self.shell.exit_now = True |
|
508 | 506 | content = dict(status='ok') |
|
509 | 507 | content.update(parent['content']) |
|
510 | 508 | self.session.send(stream, u'shutdown_reply', content, parent, ident=ident) |
|
511 | 509 | # same content, but different msg_id for broadcasting on IOPub |
|
512 | 510 | self._shutdown_message = self.session.msg(u'shutdown_reply', |
|
513 | 511 | content, parent |
|
514 | 512 | ) |
|
515 | 513 | |
|
516 | 514 | self._at_shutdown() |
|
517 | 515 | # call sys.exit after a short delay |
|
518 | 516 | loop = ioloop.IOLoop.instance() |
|
519 | 517 | loop.add_timeout(time.time()+0.1, loop.stop) |
|
520 | 518 | |
|
521 | 519 | #--------------------------------------------------------------------------- |
|
522 | 520 | # Engine methods |
|
523 | 521 | #--------------------------------------------------------------------------- |
|
524 | 522 | |
|
525 | 523 | def apply_request(self, stream, ident, parent): |
|
526 | 524 | try: |
|
527 | 525 | content = parent[u'content'] |
|
528 | 526 | bufs = parent[u'buffers'] |
|
529 | 527 | msg_id = parent['header']['msg_id'] |
|
530 | 528 | except: |
|
531 | 529 | self.log.error("Got bad msg: %s", parent, exc_info=True) |
|
532 | 530 | return |
|
533 | 531 | |
|
534 | 532 | self._publish_status(u'busy', parent) |
|
535 | 533 | |
|
536 | 534 | # Set the parent message of the display hook and out streams. |
|
537 | 535 | shell = self.shell |
|
538 | 536 | shell.displayhook.set_parent(parent) |
|
539 | 537 | shell.display_pub.set_parent(parent) |
|
540 | 538 | sys.stdout.set_parent(parent) |
|
541 | 539 | sys.stderr.set_parent(parent) |
|
542 | 540 | |
|
543 | 541 | # pyin_msg = self.session.msg(u'pyin',{u'code':code}, parent=parent) |
|
544 | 542 | # self.iopub_socket.send(pyin_msg) |
|
545 | 543 | # self.session.send(self.iopub_socket, u'pyin', {u'code':code},parent=parent) |
|
546 | 544 | sub = self._make_subheader() |
|
547 | 545 | try: |
|
548 | 546 | working = shell.user_ns |
|
549 | 547 | |
|
550 | 548 | prefix = "_"+str(msg_id).replace("-","")+"_" |
|
551 | 549 | |
|
552 | 550 | f,args,kwargs = unpack_apply_message(bufs, working, copy=False) |
|
553 | 551 | |
|
554 | 552 | fname = getattr(f, '__name__', 'f') |
|
555 | 553 | |
|
556 | 554 | fname = prefix+"f" |
|
557 | 555 | argname = prefix+"args" |
|
558 | 556 | kwargname = prefix+"kwargs" |
|
559 | 557 | resultname = prefix+"result" |
|
560 | 558 | |
|
561 | 559 | ns = { fname : f, argname : args, kwargname : kwargs , resultname : None } |
|
562 | 560 | # print ns |
|
563 | 561 | working.update(ns) |
|
564 | 562 | code = "%s = %s(*%s,**%s)" % (resultname, fname, argname, kwargname) |
|
565 | 563 | try: |
|
566 | 564 | exec code in shell.user_global_ns, shell.user_ns |
|
567 | 565 | result = working.get(resultname) |
|
568 | 566 | finally: |
|
569 | 567 | for key in ns.iterkeys(): |
|
570 | 568 | working.pop(key) |
|
571 | 569 | |
|
572 | 570 | packed_result,buf = serialize_object(result) |
|
573 | 571 | result_buf = [packed_result]+buf |
|
574 | 572 | except: |
|
575 | 573 | # invoke IPython traceback formatting |
|
576 | 574 | shell.showtraceback() |
|
577 | 575 | # FIXME - fish exception info out of shell, possibly left there by |
|
578 | 576 | # run_code. We'll need to clean up this logic later. |
|
579 | 577 | reply_content = {} |
|
580 | 578 | if shell._reply_content is not None: |
|
581 | 579 | reply_content.update(shell._reply_content) |
|
582 | 580 | e_info = dict(engine_uuid=self.ident, engine_id=self.int_id, method='apply') |
|
583 | 581 | reply_content['engine_info'] = e_info |
|
584 | 582 | # reset after use |
|
585 | 583 | shell._reply_content = None |
|
586 | 584 | |
|
587 | 585 | self.session.send(self.iopub_socket, u'pyerr', reply_content, parent=parent, |
|
588 | 586 | ident=self._topic('pyerr')) |
|
589 | 587 | result_buf = [] |
|
590 | 588 | |
|
591 | 589 | if reply_content['ename'] == 'UnmetDependency': |
|
592 | 590 | sub['dependencies_met'] = False |
|
593 | 591 | else: |
|
594 | 592 | reply_content = {'status' : 'ok'} |
|
595 | 593 | |
|
596 | 594 | # put 'ok'/'error' status in header, for scheduler introspection: |
|
597 | 595 | sub['status'] = reply_content['status'] |
|
598 | 596 | |
|
599 | 597 | # flush i/o |
|
600 | 598 | sys.stdout.flush() |
|
601 | 599 | sys.stderr.flush() |
|
602 | 600 | |
|
603 | 601 | reply_msg = self.session.send(stream, u'apply_reply', reply_content, |
|
604 | 602 | parent=parent, ident=ident,buffers=result_buf, subheader=sub) |
|
605 | 603 | |
|
606 | 604 | self._publish_status(u'idle', parent) |
|
607 | 605 | |
|
608 | 606 | #--------------------------------------------------------------------------- |
|
609 | 607 | # Control messages |
|
610 | 608 | #--------------------------------------------------------------------------- |
|
611 | 609 | |
|
612 | 610 | def abort_request(self, stream, ident, parent): |
|
613 | 611 | """abort a specifig msg by id""" |
|
614 | 612 | msg_ids = parent['content'].get('msg_ids', None) |
|
615 | 613 | if isinstance(msg_ids, basestring): |
|
616 | 614 | msg_ids = [msg_ids] |
|
617 | 615 | if not msg_ids: |
|
618 | 616 | self.abort_queues() |
|
619 | 617 | for mid in msg_ids: |
|
620 | 618 | self.aborted.add(str(mid)) |
|
621 | 619 | |
|
622 | 620 | content = dict(status='ok') |
|
623 | 621 | reply_msg = self.session.send(stream, 'abort_reply', content=content, |
|
624 | 622 | parent=parent, ident=ident) |
|
625 | 623 | self.log.debug("%s", reply_msg) |
|
626 | 624 | |
|
627 | 625 | def clear_request(self, stream, idents, parent): |
|
628 | 626 | """Clear our namespace.""" |
|
629 | 627 | self.shell.reset(False) |
|
630 | 628 | msg = self.session.send(stream, 'clear_reply', ident=idents, parent=parent, |
|
631 | 629 | content = dict(status='ok')) |
|
632 | 630 | |
|
633 | 631 | |
|
634 | 632 | #--------------------------------------------------------------------------- |
|
635 | 633 | # Protected interface |
|
636 | 634 | #--------------------------------------------------------------------------- |
|
637 | 635 | |
|
638 | 636 | |
|
639 | 637 | def _wrap_exception(self, method=None): |
|
640 | 638 | # import here, because _wrap_exception is only used in parallel, |
|
641 | 639 | # and parallel has higher min pyzmq version |
|
642 | 640 | from IPython.parallel.error import wrap_exception |
|
643 | 641 | e_info = dict(engine_uuid=self.ident, engine_id=self.int_id, method=method) |
|
644 | 642 | content = wrap_exception(e_info) |
|
645 | 643 | return content |
|
646 | 644 | |
|
647 | 645 | def _topic(self, topic): |
|
648 | 646 | """prefixed topic for IOPub messages""" |
|
649 | 647 | if self.int_id >= 0: |
|
650 | 648 | base = "engine.%i" % self.int_id |
|
651 | 649 | else: |
|
652 | 650 | base = "kernel.%s" % self.ident |
|
653 | 651 | |
|
654 | 652 | return py3compat.cast_bytes("%s.%s" % (base, topic)) |
|
655 | 653 | |
|
656 | 654 | def _abort_queues(self): |
|
657 | 655 | for stream in self.shell_streams: |
|
658 | 656 | if stream: |
|
659 | 657 | self._abort_queue(stream) |
|
660 | 658 | |
|
661 | 659 | def _abort_queue(self, stream): |
|
662 | 660 | poller = zmq.Poller() |
|
663 | 661 | poller.register(stream.socket, zmq.POLLIN) |
|
664 | 662 | while True: |
|
665 | 663 | idents,msg = self.session.recv(stream, zmq.NOBLOCK, content=True) |
|
666 | 664 | if msg is None: |
|
667 | 665 | return |
|
668 | 666 | |
|
669 | 667 | self.log.info("Aborting:") |
|
670 | 668 | self.log.info("%s", msg) |
|
671 | 669 | msg_type = msg['header']['msg_type'] |
|
672 | 670 | reply_type = msg_type.split('_')[0] + '_reply' |
|
673 | 671 | |
|
674 | 672 | status = {'status' : 'aborted'} |
|
675 | 673 | sub = {'engine' : self.ident} |
|
676 | 674 | sub.update(status) |
|
677 | 675 | reply_msg = self.session.send(stream, reply_type, subheader=sub, |
|
678 | 676 | content=status, parent=msg, ident=idents) |
|
679 | 677 | self.log.debug("%s", reply_msg) |
|
680 | 678 | # We need to wait a bit for requests to come in. This can probably |
|
681 | 679 | # be set shorter for true asynchronous clients. |
|
682 | 680 | poller.poll(50) |
|
683 | 681 | |
|
684 | 682 | |
|
685 | 683 | def _no_raw_input(self): |
|
686 | 684 | """Raise StdinNotImplentedError if active frontend doesn't support |
|
687 | 685 | stdin.""" |
|
688 | 686 | raise StdinNotImplementedError("raw_input was called, but this " |
|
689 | 687 | "frontend does not support stdin.") |
|
690 | 688 | |
|
691 | 689 | def _raw_input(self, prompt, ident, parent): |
|
692 | 690 | # Flush output before making the request. |
|
693 | 691 | sys.stderr.flush() |
|
694 | 692 | sys.stdout.flush() |
|
695 | 693 | |
|
696 | 694 | # Send the input request. |
|
697 | 695 | content = json_clean(dict(prompt=prompt)) |
|
698 | 696 | self.session.send(self.stdin_socket, u'input_request', content, parent, |
|
699 | 697 | ident=ident) |
|
700 | 698 | |
|
701 | 699 | # Await a response. |
|
702 | 700 | while True: |
|
703 | 701 | try: |
|
704 | 702 | ident, reply = self.session.recv(self.stdin_socket, 0) |
|
705 | 703 | except Exception: |
|
706 | 704 | self.log.warn("Invalid Message:", exc_info=True) |
|
707 | 705 | else: |
|
708 | 706 | break |
|
709 | 707 | try: |
|
710 | 708 | value = reply['content']['value'] |
|
711 | 709 | except: |
|
712 | 710 | self.log.error("Got bad raw_input reply: ") |
|
713 | 711 | self.log.error("%s", parent) |
|
714 | 712 | value = '' |
|
715 | 713 | if value == '\x04': |
|
716 | 714 | # EOF |
|
717 | 715 | raise EOFError |
|
718 | 716 | return value |
|
719 | 717 | |
|
720 | 718 | def _complete(self, msg): |
|
721 | 719 | c = msg['content'] |
|
722 | 720 | try: |
|
723 | 721 | cpos = int(c['cursor_pos']) |
|
724 | 722 | except: |
|
725 | 723 | # If we don't get something that we can convert to an integer, at |
|
726 | 724 | # least attempt the completion guessing the cursor is at the end of |
|
727 | 725 | # the text, if there's any, and otherwise of the line |
|
728 | 726 | cpos = len(c['text']) |
|
729 | 727 | if cpos==0: |
|
730 | 728 | cpos = len(c['line']) |
|
731 | 729 | return self.shell.complete(c['text'], c['line'], cpos) |
|
732 | 730 | |
|
733 | 731 | def _object_info(self, context): |
|
734 | 732 | symbol, leftover = self._symbol_from_context(context) |
|
735 | 733 | if symbol is not None and not leftover: |
|
736 | 734 | doc = getattr(symbol, '__doc__', '') |
|
737 | 735 | else: |
|
738 | 736 | doc = '' |
|
739 | 737 | object_info = dict(docstring = doc) |
|
740 | 738 | return object_info |
|
741 | 739 | |
|
742 | 740 | def _symbol_from_context(self, context): |
|
743 | 741 | if not context: |
|
744 | 742 | return None, context |
|
745 | 743 | |
|
746 | 744 | base_symbol_string = context[0] |
|
747 | 745 | symbol = self.shell.user_ns.get(base_symbol_string, None) |
|
748 | 746 | if symbol is None: |
|
749 | 747 | symbol = __builtin__.__dict__.get(base_symbol_string, None) |
|
750 | 748 | if symbol is None: |
|
751 | 749 | return None, context |
|
752 | 750 | |
|
753 | 751 | context = context[1:] |
|
754 | 752 | for i, name in enumerate(context): |
|
755 | 753 | new_symbol = getattr(symbol, name, None) |
|
756 | 754 | if new_symbol is None: |
|
757 | 755 | return symbol, context[i:] |
|
758 | 756 | else: |
|
759 | 757 | symbol = new_symbol |
|
760 | 758 | |
|
761 | 759 | return symbol, [] |
|
762 | 760 | |
|
763 | 761 | def _at_shutdown(self): |
|
764 | 762 | """Actions taken at shutdown by the kernel, called by python's atexit. |
|
765 | 763 | """ |
|
766 | 764 | # io.rprint("Kernel at_shutdown") # dbg |
|
767 | 765 | if self._shutdown_message is not None: |
|
768 | 766 | self.session.send(self.iopub_socket, self._shutdown_message, ident=self._topic('shutdown')) |
|
769 | 767 | self.log.debug("%s", self._shutdown_message) |
|
770 | 768 | [ s.flush(zmq.POLLOUT) for s in self.shell_streams ] |
|
771 | 769 | |
|
772 | 770 | #----------------------------------------------------------------------------- |
|
773 | 771 | # Aliases and Flags for the IPKernelApp |
|
774 | 772 | #----------------------------------------------------------------------------- |
|
775 | 773 | |
|
776 | 774 | flags = dict(kernel_flags) |
|
777 | 775 | flags.update(shell_flags) |
|
778 | 776 | |
|
779 | 777 | addflag = lambda *args: flags.update(boolean_flag(*args)) |
|
780 | 778 | |
|
781 | 779 | flags['pylab'] = ( |
|
782 | 780 | {'IPKernelApp' : {'pylab' : 'auto'}}, |
|
783 | 781 | """Pre-load matplotlib and numpy for interactive use with |
|
784 | 782 | the default matplotlib backend.""" |
|
785 | 783 | ) |
|
786 | 784 | |
|
787 | 785 | aliases = dict(kernel_aliases) |
|
788 | 786 | aliases.update(shell_aliases) |
|
789 | 787 | |
|
790 | 788 | #----------------------------------------------------------------------------- |
|
791 | 789 | # The IPKernelApp class |
|
792 | 790 | #----------------------------------------------------------------------------- |
|
793 | 791 | |
|
794 | 792 | class IPKernelApp(KernelApp, InteractiveShellApp): |
|
795 | 793 | name = 'ipkernel' |
|
796 | 794 | |
|
797 | 795 | aliases = Dict(aliases) |
|
798 | 796 | flags = Dict(flags) |
|
799 | 797 | classes = [Kernel, ZMQInteractiveShell, ProfileDir, Session] |
|
800 | 798 | |
|
801 | 799 | @catch_config_error |
|
802 | 800 | def initialize(self, argv=None): |
|
803 | 801 | super(IPKernelApp, self).initialize(argv) |
|
804 | 802 | self.init_path() |
|
805 | 803 | self.init_shell() |
|
806 | 804 | self.init_gui_pylab() |
|
807 | 805 | self.init_extensions() |
|
808 | 806 | self.init_code() |
|
809 | 807 | |
|
810 | 808 | def init_kernel(self): |
|
811 | 809 | |
|
812 | 810 | shell_stream = ZMQStream(self.shell_socket) |
|
813 | 811 | |
|
814 | 812 | kernel = Kernel(config=self.config, session=self.session, |
|
815 | 813 | shell_streams=[shell_stream], |
|
816 | 814 | iopub_socket=self.iopub_socket, |
|
817 | 815 | stdin_socket=self.stdin_socket, |
|
818 | 816 | log=self.log, |
|
819 | 817 | profile_dir=self.profile_dir, |
|
820 | 818 | ) |
|
821 | 819 | self.kernel = kernel |
|
822 | 820 | kernel.record_ports(self.ports) |
|
823 | 821 | shell = kernel.shell |
|
824 | 822 | |
|
825 | 823 | def init_gui_pylab(self): |
|
826 | 824 | """Enable GUI event loop integration, taking pylab into account.""" |
|
827 | 825 | |
|
828 | 826 | # Provide a wrapper for :meth:`InteractiveShellApp.init_gui_pylab` |
|
829 | 827 | # to ensure that any exception is printed straight to stderr. |
|
830 | 828 | # Normally _showtraceback associates the reply with an execution, |
|
831 | 829 | # which means frontends will never draw it, as this exception |
|
832 | 830 | # is not associated with any execute request. |
|
833 | 831 | |
|
834 | 832 | shell = self.shell |
|
835 | 833 | _showtraceback = shell._showtraceback |
|
836 | 834 | try: |
|
837 | 835 | # replace pyerr-sending traceback with stderr |
|
838 | 836 | def print_tb(etype, evalue, stb): |
|
839 | 837 | print ("GUI event loop or pylab initialization failed", |
|
840 | 838 | file=io.stderr) |
|
841 | 839 | print (shell.InteractiveTB.stb2text(stb), file=io.stderr) |
|
842 | 840 | shell._showtraceback = print_tb |
|
843 | 841 | InteractiveShellApp.init_gui_pylab(self) |
|
844 | 842 | finally: |
|
845 | 843 | shell._showtraceback = _showtraceback |
|
846 | 844 | |
|
847 | 845 | def init_shell(self): |
|
848 | 846 | self.shell = self.kernel.shell |
|
849 | 847 | self.shell.configurables.append(self) |
|
850 | 848 | |
|
851 | 849 | |
|
852 | 850 | #----------------------------------------------------------------------------- |
|
853 | 851 | # Kernel main and launch functions |
|
854 | 852 | #----------------------------------------------------------------------------- |
|
855 | 853 | |
|
856 | 854 | def launch_kernel(*args, **kwargs): |
|
857 | 855 | """Launches a localhost IPython kernel, binding to the specified ports. |
|
858 | 856 | |
|
859 | 857 | This function simply calls entry_point.base_launch_kernel with the right |
|
860 | 858 | first command to start an ipkernel. See base_launch_kernel for arguments. |
|
861 | 859 | |
|
862 | 860 | Returns |
|
863 | 861 | ------- |
|
864 | 862 | A tuple of form: |
|
865 | 863 | (kernel_process, shell_port, iopub_port, stdin_port, hb_port) |
|
866 | 864 | where kernel_process is a Popen object and the ports are integers. |
|
867 | 865 | """ |
|
868 | 866 | return base_launch_kernel('from IPython.zmq.ipkernel import main; main()', |
|
869 | 867 | *args, **kwargs) |
|
870 | 868 | |
|
871 | 869 | |
|
872 | 870 | def embed_kernel(module=None, local_ns=None, **kwargs): |
|
873 | 871 | """Embed and start an IPython kernel in a given scope. |
|
874 | 872 | |
|
875 | 873 | Parameters |
|
876 | 874 | ---------- |
|
877 | 875 | module : ModuleType, optional |
|
878 | 876 | The module to load into IPython globals (default: caller) |
|
879 | 877 | local_ns : dict, optional |
|
880 | 878 | The namespace to load into IPython user namespace (default: caller) |
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881 | 879 | |
|
882 | 880 | kwargs : various, optional |
|
883 | 881 | Further keyword args are relayed to the KernelApp constructor, |
|
884 | 882 | allowing configuration of the Kernel. Will only have an effect |
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885 | 883 | on the first embed_kernel call for a given process. |
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886 | 884 | |
|
887 | 885 | """ |
|
888 | 886 | # get the app if it exists, or set it up if it doesn't |
|
889 | 887 | if IPKernelApp.initialized(): |
|
890 | 888 | app = IPKernelApp.instance() |
|
891 | 889 | else: |
|
892 | 890 | app = IPKernelApp.instance(**kwargs) |
|
893 | 891 | app.initialize([]) |
|
894 | 892 | # Undo unnecessary sys module mangling from init_sys_modules. |
|
895 | 893 | # This would not be necessary if we could prevent it |
|
896 | 894 | # in the first place by using a different InteractiveShell |
|
897 | 895 | # subclass, as in the regular embed case. |
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898 | 896 | main = app.kernel.shell._orig_sys_modules_main_mod |
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899 | 897 | if main is not None: |
|
900 | 898 | sys.modules[app.kernel.shell._orig_sys_modules_main_name] = main |
|
901 | 899 | |
|
902 | 900 | # load the calling scope if not given |
|
903 | 901 | (caller_module, caller_locals) = extract_module_locals(1) |
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904 | 902 | if module is None: |
|
905 | 903 | module = caller_module |
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906 | 904 | if local_ns is None: |
|
907 | 905 | local_ns = caller_locals |
|
908 | 906 | |
|
909 | 907 | app.kernel.user_module = module |
|
910 | 908 | app.kernel.user_ns = local_ns |
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911 | 909 | app.shell.set_completer_frame() |
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912 | 910 | app.start() |
|
913 | 911 | |
|
914 | 912 | def main(): |
|
915 | 913 | """Run an IPKernel as an application""" |
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916 | 914 | app = IPKernelApp.instance() |
|
917 | 915 | app.initialize() |
|
918 | 916 | app.start() |
|
919 | 917 | |
|
920 | 918 | |
|
921 | 919 | if __name__ == '__main__': |
|
922 | 920 | main() |
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