|
|
#!/usr/bin/env python
|
|
|
# encoding: utf-8
|
|
|
|
|
|
"""Magic command interface for interactive parallel work."""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2009 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import ast
|
|
|
import re
|
|
|
|
|
|
from IPython.core.plugin import Plugin
|
|
|
from IPython.utils.traitlets import Bool, Any, Instance
|
|
|
from IPython.testing import decorators as testdec
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Definitions of magic functions for use with IPython
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
NO_ACTIVE_VIEW = """
|
|
|
Use activate() on a DirectView object to activate it for magics.
|
|
|
"""
|
|
|
|
|
|
|
|
|
class ParalleMagic(Plugin):
|
|
|
"""A component to manage the %result, %px and %autopx magics."""
|
|
|
|
|
|
active_view = Instance('IPython.parallel.client.view.DirectView')
|
|
|
verbose = Bool(False, config=True)
|
|
|
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
|
|
|
|
|
|
def __init__(self, shell=None, config=None):
|
|
|
super(ParalleMagic, self).__init__(shell=shell, config=config)
|
|
|
self._define_magics()
|
|
|
# A flag showing if autopx is activated or not
|
|
|
self.autopx = False
|
|
|
|
|
|
def _define_magics(self):
|
|
|
"""Define the magic functions."""
|
|
|
self.shell.define_magic('result', self.magic_result)
|
|
|
self.shell.define_magic('px', self.magic_px)
|
|
|
self.shell.define_magic('autopx', self.magic_autopx)
|
|
|
|
|
|
@testdec.skip_doctest
|
|
|
def magic_result(self, ipself, parameter_s=''):
|
|
|
"""Print the result of command i on all engines..
|
|
|
|
|
|
To use this a :class:`DirectView` instance must be created
|
|
|
and then activated by calling its :meth:`activate` method.
|
|
|
|
|
|
Then you can do the following::
|
|
|
|
|
|
In [23]: %result
|
|
|
Out[23]:
|
|
|
<Results List>
|
|
|
[0] In [6]: a = 10
|
|
|
[1] In [6]: a = 10
|
|
|
|
|
|
In [22]: %result 6
|
|
|
Out[22]:
|
|
|
<Results List>
|
|
|
[0] In [6]: a = 10
|
|
|
[1] In [6]: a = 10
|
|
|
"""
|
|
|
if self.active_view is None:
|
|
|
print NO_ACTIVE_VIEW
|
|
|
return
|
|
|
|
|
|
try:
|
|
|
index = int(parameter_s)
|
|
|
except:
|
|
|
index = None
|
|
|
result = self.active_view.get_result(index)
|
|
|
return result
|
|
|
|
|
|
@testdec.skip_doctest
|
|
|
def magic_px(self, ipself, parameter_s=''):
|
|
|
"""Executes the given python command in parallel.
|
|
|
|
|
|
To use this a :class:`DirectView` instance must be created
|
|
|
and then activated by calling its :meth:`activate` method.
|
|
|
|
|
|
Then you can do the following::
|
|
|
|
|
|
In [24]: %px a = 5
|
|
|
Parallel execution on engines: all
|
|
|
Out[24]:
|
|
|
<Results List>
|
|
|
[0] In [7]: a = 5
|
|
|
[1] In [7]: a = 5
|
|
|
"""
|
|
|
|
|
|
if self.active_view is None:
|
|
|
print NO_ACTIVE_VIEW
|
|
|
return
|
|
|
print "Parallel execution on engines: %s" % self.active_view.targets
|
|
|
result = self.active_view.execute(parameter_s, block=False)
|
|
|
if self.active_view.block:
|
|
|
result.get()
|
|
|
self._maybe_display_output(result)
|
|
|
|
|
|
@testdec.skip_doctest
|
|
|
def magic_autopx(self, ipself, parameter_s=''):
|
|
|
"""Toggles auto parallel mode.
|
|
|
|
|
|
To use this a :class:`DirectView` instance must be created
|
|
|
and then activated by calling its :meth:`activate` method. Once this
|
|
|
is called, all commands typed at the command line are send to
|
|
|
the engines to be executed in parallel. To control which engine
|
|
|
are used, set the ``targets`` attributed of the multiengine client
|
|
|
before entering ``%autopx`` mode.
|
|
|
|
|
|
Then you can do the following::
|
|
|
|
|
|
In [25]: %autopx
|
|
|
%autopx to enabled
|
|
|
|
|
|
In [26]: a = 10
|
|
|
Parallel execution on engines: [0,1,2,3]
|
|
|
In [27]: print a
|
|
|
Parallel execution on engines: [0,1,2,3]
|
|
|
[stdout:0] 10
|
|
|
[stdout:1] 10
|
|
|
[stdout:2] 10
|
|
|
[stdout:3] 10
|
|
|
|
|
|
|
|
|
In [27]: %autopx
|
|
|
%autopx disabled
|
|
|
"""
|
|
|
if self.autopx:
|
|
|
self._disable_autopx()
|
|
|
else:
|
|
|
self._enable_autopx()
|
|
|
|
|
|
def _enable_autopx(self):
|
|
|
"""Enable %autopx mode by saving the original run_cell and installing
|
|
|
pxrun_cell.
|
|
|
"""
|
|
|
if self.active_view is None:
|
|
|
print NO_ACTIVE_VIEW
|
|
|
return
|
|
|
|
|
|
# override run_cell and run_code
|
|
|
self._original_run_cell = self.shell.run_cell
|
|
|
self.shell.run_cell = self.pxrun_cell
|
|
|
self._original_run_code = self.shell.run_code
|
|
|
self.shell.run_code = self.pxrun_code
|
|
|
|
|
|
self.autopx = True
|
|
|
print "%autopx enabled"
|
|
|
|
|
|
def _disable_autopx(self):
|
|
|
"""Disable %autopx by restoring the original InteractiveShell.run_cell.
|
|
|
"""
|
|
|
if self.autopx:
|
|
|
self.shell.run_cell = self._original_run_cell
|
|
|
self.shell.run_code = self._original_run_code
|
|
|
self.autopx = False
|
|
|
print "%autopx disabled"
|
|
|
|
|
|
def _maybe_display_output(self, result):
|
|
|
"""Maybe display the output of a parallel result.
|
|
|
|
|
|
If self.active_view.block is True, wait for the result
|
|
|
and display the result. Otherwise, this is a noop.
|
|
|
"""
|
|
|
targets = self.active_view.targets
|
|
|
if isinstance(targets, int):
|
|
|
targets = [targets]
|
|
|
if targets == 'all':
|
|
|
targets = self.active_view.client.ids
|
|
|
stdout = [s.rstrip() for s in result.stdout]
|
|
|
if any(stdout):
|
|
|
for i,eid in enumerate(targets):
|
|
|
print '[stdout:%i]'%eid, stdout[i]
|
|
|
|
|
|
|
|
|
def pxrun_cell(self, raw_cell, store_history=True):
|
|
|
"""drop-in replacement for InteractiveShell.run_cell.
|
|
|
|
|
|
This executes code remotely, instead of in the local namespace.
|
|
|
|
|
|
See InteractiveShell.run_cell for details.
|
|
|
"""
|
|
|
|
|
|
if (not raw_cell) or raw_cell.isspace():
|
|
|
return
|
|
|
|
|
|
ipself = self.shell
|
|
|
|
|
|
with ipself.builtin_trap:
|
|
|
cell = ipself.prefilter_manager.prefilter_lines(raw_cell)
|
|
|
|
|
|
# Store raw and processed history
|
|
|
if store_history:
|
|
|
ipself.history_manager.store_inputs(ipself.execution_count,
|
|
|
cell, raw_cell)
|
|
|
|
|
|
# ipself.logger.log(cell, raw_cell)
|
|
|
|
|
|
cell_name = ipself.compile.cache(cell, ipself.execution_count)
|
|
|
|
|
|
try:
|
|
|
code_ast = ast.parse(cell, filename=cell_name)
|
|
|
except (OverflowError, SyntaxError, ValueError, TypeError, MemoryError):
|
|
|
# Case 1
|
|
|
ipself.showsyntaxerror()
|
|
|
ipself.execution_count += 1
|
|
|
return None
|
|
|
except NameError:
|
|
|
# ignore name errors, because we don't know the remote keys
|
|
|
pass
|
|
|
|
|
|
if store_history:
|
|
|
# Write output to the database. Does nothing unless
|
|
|
# history output logging is enabled.
|
|
|
ipself.history_manager.store_output(ipself.execution_count)
|
|
|
# Each cell is a *single* input, regardless of how many lines it has
|
|
|
ipself.execution_count += 1
|
|
|
|
|
|
if re.search(r'get_ipython\(\)\.magic\(u?"%?autopx', cell):
|
|
|
self._disable_autopx()
|
|
|
return False
|
|
|
else:
|
|
|
try:
|
|
|
result = self.active_view.execute(cell, block=False)
|
|
|
except:
|
|
|
ipself.showtraceback()
|
|
|
return True
|
|
|
else:
|
|
|
if self.active_view.block:
|
|
|
try:
|
|
|
result.get()
|
|
|
except:
|
|
|
self.shell.showtraceback()
|
|
|
return True
|
|
|
else:
|
|
|
self._maybe_display_output(result)
|
|
|
return False
|
|
|
|
|
|
def pxrun_code(self, code_obj):
|
|
|
"""drop-in replacement for InteractiveShell.run_code.
|
|
|
|
|
|
This executes code remotely, instead of in the local namespace.
|
|
|
|
|
|
See InteractiveShell.run_code for details.
|
|
|
"""
|
|
|
ipself = self.shell
|
|
|
# check code object for the autopx magic
|
|
|
if 'get_ipython' in code_obj.co_names and 'magic' in code_obj.co_names and \
|
|
|
any( [ isinstance(c, basestring) and 'autopx' in c for c in code_obj.co_consts ]):
|
|
|
self._disable_autopx()
|
|
|
return False
|
|
|
else:
|
|
|
try:
|
|
|
result = self.active_view.execute(code_obj, block=False)
|
|
|
except:
|
|
|
ipself.showtraceback()
|
|
|
return True
|
|
|
else:
|
|
|
if self.active_view.block:
|
|
|
try:
|
|
|
result.get()
|
|
|
except:
|
|
|
self.shell.showtraceback()
|
|
|
return True
|
|
|
else:
|
|
|
self._maybe_display_output(result)
|
|
|
return False
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
_loaded = False
|
|
|
|
|
|
|
|
|
def load_ipython_extension(ip):
|
|
|
"""Load the extension in IPython."""
|
|
|
global _loaded
|
|
|
if not _loaded:
|
|
|
plugin = ParalleMagic(shell=ip, config=ip.config)
|
|
|
ip.plugin_manager.register_plugin('parallelmagic', plugin)
|
|
|
_loaded = True
|
|
|
|
|
|
|
