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@@ -1,289 +1,312 b'' | |||||
1 | """Implementation of magic functions related to History. |
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1 | """Implementation of magic functions related to History. | |
2 | """ |
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2 | """ | |
3 | #----------------------------------------------------------------------------- |
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3 | #----------------------------------------------------------------------------- | |
4 | # Copyright (c) 2012, IPython Development Team. |
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4 | # Copyright (c) 2012, IPython Development Team. | |
5 | # |
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5 | # | |
6 | # Distributed under the terms of the Modified BSD License. |
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6 | # Distributed under the terms of the Modified BSD License. | |
7 | # |
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7 | # | |
8 | # The full license is in the file COPYING.txt, distributed with this software. |
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8 | # The full license is in the file COPYING.txt, distributed with this software. | |
9 | #----------------------------------------------------------------------------- |
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9 | #----------------------------------------------------------------------------- | |
10 |
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10 | |||
11 | #----------------------------------------------------------------------------- |
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11 | #----------------------------------------------------------------------------- | |
12 | # Imports |
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12 | # Imports | |
13 | #----------------------------------------------------------------------------- |
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13 | #----------------------------------------------------------------------------- | |
14 | from __future__ import print_function |
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14 | from __future__ import print_function | |
15 |
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15 | |||
16 | # Stdlib |
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16 | # Stdlib | |
17 | import os |
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17 | import os | |
18 | from io import open as io_open |
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18 | from io import open as io_open | |
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19 | from argparse import Action | |||
19 |
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20 | |||
20 | # Our own packages |
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21 | # Our own packages | |
21 | from IPython.core.error import StdinNotImplementedError |
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22 | from IPython.core.error import StdinNotImplementedError | |
22 | from IPython.core.magic import Magics, magics_class, line_magic |
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23 | from IPython.core.magic import Magics, magics_class, line_magic | |
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24 | from IPython.core.magic_arguments import (argument, magic_arguments, | |||
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25 | parse_argstring) | |||
23 | from IPython.testing.skipdoctest import skip_doctest |
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26 | from IPython.testing.skipdoctest import skip_doctest | |
24 | from IPython.utils import io |
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27 | from IPython.utils import io | |
25 |
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28 | |||
26 | #----------------------------------------------------------------------------- |
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29 | #----------------------------------------------------------------------------- | |
27 | # Magics class implementation |
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30 | # Magics class implementation | |
28 | #----------------------------------------------------------------------------- |
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31 | #----------------------------------------------------------------------------- | |
29 |
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32 | |||
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33 | ||||
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34 | class HistoryArgLimitAction(Action): | |||
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35 | def __call__(self, parser, namespace, values, option_string=None): | |||
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36 | namespace.limit_specified = True | |||
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37 | namespace.limit = values | |||
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38 | ||||
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39 | ||||
30 | @magics_class |
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40 | @magics_class | |
31 | class HistoryMagics(Magics): |
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41 | class HistoryMagics(Magics): | |
32 |
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42 | |||
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43 | @magic_arguments() | |||
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44 | @argument( | |||
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45 | '-n', dest='print_nums', action='store_true', default=False, | |||
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46 | help=""" | |||
|
47 | print line numbers for each input. | |||
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48 | This feature is only available if numbered prompts are in use. | |||
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49 | """) | |||
|
50 | @argument( | |||
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51 | '-o', dest='get_output', action='store_true', default=False, | |||
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52 | help="also print outputs for each input.") | |||
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53 | @argument( | |||
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54 | '-p', dest='pyprompts', action='store_true', default=False, | |||
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55 | help=""" | |||
|
56 | print classic '>>>' python prompts before each input. | |||
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57 | This is useful for making documentation, and in conjunction | |||
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58 | with -o, for producing doctest-ready output. | |||
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59 | """) | |||
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60 | @argument( | |||
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61 | '-t', dest='raw', action='store_false', default=True, | |||
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62 | help=""" | |||
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63 | print the 'translated' history, as IPython understands it. | |||
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64 | IPython filters your input and converts it all into valid Python | |||
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65 | source before executing it (things like magics or aliases are turned | |||
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66 | into function calls, for example). With this option, you'll see the | |||
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67 | native history instead of the user-entered version: '%%cd /' will be | |||
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68 | seen as 'get_ipython().magic("%%cd /")' instead of '%%cd /'. | |||
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69 | """) | |||
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70 | @argument( | |||
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71 | '-f', dest='filename', | |||
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72 | help=""" | |||
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73 | FILENAME: instead of printing the output to the screen, redirect | |||
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74 | it to the given file. The file is always overwritten, though *when | |||
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75 | it can*, IPython asks for confirmation first. In particular, running | |||
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76 | the command 'history -f FILENAME' from the IPython Notebook | |||
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77 | interface will replace FILENAME even if it already exists *without* | |||
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78 | confirmation. | |||
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79 | """) | |||
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80 | @argument( | |||
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81 | '-g', dest='pattern', nargs='*', default=None, | |||
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82 | help=""" | |||
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83 | treat the arg as a pattern to grep for in (full) history. | |||
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84 | This includes the saved history (almost all commands ever written). | |||
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85 | The pattern may contain '?' to match one unknown character and '*' | |||
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86 | to match any number of unknown characters. Use '%%hist -g' to show | |||
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87 | full saved history (may be very long). | |||
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88 | """) | |||
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89 | @argument( | |||
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90 | '-l', dest='limit', type=int, nargs='?', action=HistoryArgLimitAction, | |||
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91 | help=""" | |||
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92 | get the last n lines from all sessions. Specify n as a single | |||
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93 | arg, or the default is the last 10 lines. | |||
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94 | """) | |||
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95 | @argument('range', nargs='*') | |||
33 | @skip_doctest |
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96 | @skip_doctest | |
34 | @line_magic |
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97 | @line_magic | |
35 | def history(self, parameter_s = ''): |
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98 | def history(self, parameter_s = ''): | |
36 | """Print input history (_i<n> variables), with most recent last. |
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99 | """Print input history (_i<n> variables), with most recent last. | |
37 |
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100 | |||
38 | %history [-o -p -t -n] [-f filename] [range | -g pattern | -l number] |
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39 |
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40 | By default, input history is printed without line numbers so it can be |
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101 | By default, input history is printed without line numbers so it can be | |
41 | directly pasted into an editor. Use -n to show them. |
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102 | directly pasted into an editor. Use -n to show them. | |
42 |
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103 | |||
43 | By default, all input history from the current session is displayed. |
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104 | By default, all input history from the current session is displayed. | |
44 | Ranges of history can be indicated using the syntax: |
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105 | Ranges of history can be indicated using the syntax: | |
45 | 4 : Line 4, current session |
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106 | 4 : Line 4, current session | |
46 | 4-6 : Lines 4-6, current session |
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107 | 4-6 : Lines 4-6, current session | |
47 | 243/1-5: Lines 1-5, session 243 |
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108 | 243/1-5: Lines 1-5, session 243 | |
48 | ~2/7 : Line 7, session 2 before current |
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109 | ~2/7 : Line 7, session 2 before current | |
49 | ~8/1-~6/5 : From the first line of 8 sessions ago, to the fifth line |
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110 | ~8/1-~6/5 : From the first line of 8 sessions ago, to the fifth line | |
50 | of 6 sessions ago. |
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111 | of 6 sessions ago. | |
51 | Multiple ranges can be entered, separated by spaces |
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112 | Multiple ranges can be entered, separated by spaces | |
52 |
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113 | |||
53 | The same syntax is used by %macro, %save, %edit, %rerun |
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114 | The same syntax is used by %macro, %save, %edit, %rerun | |
54 |
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115 | |||
55 | Options: |
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56 |
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57 | -n: print line numbers for each input. |
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58 | This feature is only available if numbered prompts are in use. |
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59 |
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60 | -o: also print outputs for each input. |
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61 |
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62 | -p: print classic '>>>' python prompts before each input. This is |
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63 | useful for making documentation, and in conjunction with -o, for |
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64 | producing doctest-ready output. |
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65 |
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66 | -r: (default) print the 'raw' history, i.e. the actual commands you |
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67 | typed. |
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68 |
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69 | -t: print the 'translated' history, as IPython understands it. |
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70 | IPython filters your input and converts it all into valid Python |
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71 | source before executing it (things like magics or aliases are turned |
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72 | into function calls, for example). With this option, you'll see the |
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73 | native history instead of the user-entered version: '%cd /' will be |
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74 | seen as 'get_ipython().magic("%cd /")' instead of '%cd /'. |
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75 |
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76 | -g: treat the arg as a pattern to grep for in (full) history. |
|
|||
77 | This includes the saved history (almost all commands ever written). |
|
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78 | The pattern may contain '?' to match one unknown character and '*' |
|
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79 | to match any number of unknown characters. Use '%hist -g' to show |
|
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80 | full saved history (may be very long). |
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81 |
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82 | -l: get the last n lines from all sessions. Specify n as a single |
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83 | arg, or the default is the last 10 lines. |
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84 |
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85 | -f FILENAME: instead of printing the output to the screen, redirect |
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86 | it to the given file. The file is always overwritten, though *when |
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87 | it can*, IPython asks for confirmation first. In particular, running |
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88 | the command 'history -f FILENAME' from the IPython Notebook |
|
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89 | interface will replace FILENAME even if it already exists *without* |
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90 | confirmation. |
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91 |
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92 | Examples |
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116 | Examples | |
93 | -------- |
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117 | -------- | |
94 | :: |
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118 | :: | |
95 |
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119 | |||
96 | In [6]: %history -n 4-6 |
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120 | In [6]: %history -n 4-6 | |
97 | 4:a = 12 |
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121 | 4:a = 12 | |
98 | 5:print a**2 |
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122 | 5:print a**2 | |
99 | 6:%history -n 4-6 |
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123 | 6:%history -n 4-6 | |
100 |
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124 | |||
101 | """ |
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125 | """ | |
102 |
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126 | |||
103 | if not self.shell.displayhook.do_full_cache: |
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127 | if not self.shell.displayhook.do_full_cache: | |
104 | print('This feature is only available if numbered prompts ' |
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128 | print('This feature is only available if numbered prompts ' | |
105 | 'are in use.') |
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129 | 'are in use.') | |
106 | return |
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130 | return | |
107 | opts,args = self.parse_options(parameter_s,'noprtglf:',mode='string') |
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131 | args = parse_argstring(self.history, parameter_s) | |
108 |
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132 | |||
109 | # For brevity |
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133 | # For brevity | |
110 | history_manager = self.shell.history_manager |
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134 | history_manager = self.shell.history_manager | |
111 |
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135 | |||
112 | def _format_lineno(session, line): |
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136 | def _format_lineno(session, line): | |
113 | """Helper function to format line numbers properly.""" |
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137 | """Helper function to format line numbers properly.""" | |
114 | if session in (0, history_manager.session_number): |
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138 | if session in (0, history_manager.session_number): | |
115 | return str(line) |
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139 | return str(line) | |
116 | return "%s/%s" % (session, line) |
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140 | return "%s/%s" % (session, line) | |
117 |
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141 | |||
118 | # Check if output to specific file was requested. |
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142 | # Check if output to specific file was requested. | |
119 | try: |
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143 | outfname = args.filename | |
120 |
|
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144 | if not outfname: | |
121 | except KeyError: |
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122 | outfile = io.stdout # default |
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145 | outfile = io.stdout # default | |
123 | # We don't want to close stdout at the end! |
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146 | # We don't want to close stdout at the end! | |
124 | close_at_end = False |
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147 | close_at_end = False | |
125 | else: |
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148 | else: | |
126 | if os.path.exists(outfname): |
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149 | if os.path.exists(outfname): | |
127 | try: |
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150 | try: | |
128 | ans = io.ask_yes_no("File %r exists. Overwrite?" % outfname) |
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151 | ans = io.ask_yes_no("File %r exists. Overwrite?" % outfname) | |
129 | except StdinNotImplementedError: |
|
152 | except StdinNotImplementedError: | |
130 | ans = True |
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153 | ans = True | |
131 | if not ans: |
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154 | if not ans: | |
132 | print('Aborting.') |
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155 | print('Aborting.') | |
133 | return |
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156 | return | |
134 | print("Overwriting file.") |
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157 | print("Overwriting file.") | |
135 | outfile = io_open(outfname, 'w', encoding='utf-8') |
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158 | outfile = io_open(outfname, 'w', encoding='utf-8') | |
136 | close_at_end = True |
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159 | close_at_end = True | |
137 |
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160 | |||
138 |
print_nums = |
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161 | print_nums = args.print_nums | |
139 |
get_output = |
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162 | get_output = args.get_output | |
140 |
pyprompts = |
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163 | pyprompts = args.pyprompts | |
141 | # Raw history is the default |
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164 | raw = args.raw | |
142 | raw = not('t' in opts) |
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143 |
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165 | |||
144 | pattern = None |
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166 | pattern = None | |
145 |
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167 | |||
146 | if 'g' in opts: # Glob search |
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168 | if args.pattern is not None: | |
147 | pattern = "*" + args + "*" if args else "*" |
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169 | if args.pattern: | |
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170 | pattern = "*" + " ".join(args.pattern) + "*" | |||
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171 | else: | |||
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172 | pattern = "*" | |||
148 | hist = history_manager.search(pattern, raw=raw, output=get_output) |
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173 | hist = history_manager.search(pattern, raw=raw, output=get_output) | |
149 | print_nums = True |
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174 | print_nums = True | |
150 | elif 'l' in opts: # Get 'tail' |
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175 | elif getattr(args, 'limit_specified', False): | |
151 | try: |
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176 | n = 10 if args.limit is None else args.limit | |
152 | n = int(args) |
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153 | except (ValueError, IndexError): |
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154 | n = 10 |
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155 | hist = history_manager.get_tail(n, raw=raw, output=get_output) |
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177 | hist = history_manager.get_tail(n, raw=raw, output=get_output) | |
156 | else: |
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178 | else: | |
157 |
if args: |
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179 | if args.range: # Get history by ranges | |
158 |
hist = history_manager.get_range_by_str(args, |
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180 | hist = history_manager.get_range_by_str(" ".join(args.range), | |
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181 | raw, get_output) | |||
159 | else: # Just get history for the current session |
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182 | else: # Just get history for the current session | |
160 | hist = history_manager.get_range(raw=raw, output=get_output) |
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183 | hist = history_manager.get_range(raw=raw, output=get_output) | |
161 |
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184 | |||
162 | # We could be displaying the entire history, so let's not try to pull |
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185 | # We could be displaying the entire history, so let's not try to pull | |
163 | # it into a list in memory. Anything that needs more space will just |
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186 | # it into a list in memory. Anything that needs more space will just | |
164 | # misalign. |
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187 | # misalign. | |
165 | width = 4 |
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188 | width = 4 | |
166 |
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189 | |||
167 | for session, lineno, inline in hist: |
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190 | for session, lineno, inline in hist: | |
168 | # Print user history with tabs expanded to 4 spaces. The GUI |
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191 | # Print user history with tabs expanded to 4 spaces. The GUI | |
169 | # clients use hard tabs for easier usability in auto-indented code, |
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192 | # clients use hard tabs for easier usability in auto-indented code, | |
170 | # but we want to produce PEP-8 compliant history for safe pasting |
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193 | # but we want to produce PEP-8 compliant history for safe pasting | |
171 | # into an editor. |
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194 | # into an editor. | |
172 | if get_output: |
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195 | if get_output: | |
173 | inline, output = inline |
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196 | inline, output = inline | |
174 | inline = inline.expandtabs(4).rstrip() |
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197 | inline = inline.expandtabs(4).rstrip() | |
175 |
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198 | |||
176 | multiline = "\n" in inline |
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199 | multiline = "\n" in inline | |
177 | line_sep = '\n' if multiline else ' ' |
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200 | line_sep = '\n' if multiline else ' ' | |
178 | if print_nums: |
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201 | if print_nums: | |
179 | print(u'%s:%s' % (_format_lineno(session, lineno).rjust(width), |
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202 | print(u'%s:%s' % (_format_lineno(session, lineno).rjust(width), | |
180 | line_sep), file=outfile, end=u'') |
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203 | line_sep), file=outfile, end=u'') | |
181 | if pyprompts: |
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204 | if pyprompts: | |
182 | print(u">>> ", end=u"", file=outfile) |
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205 | print(u">>> ", end=u"", file=outfile) | |
183 | if multiline: |
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206 | if multiline: | |
184 | inline = "\n... ".join(inline.splitlines()) + "\n..." |
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207 | inline = "\n... ".join(inline.splitlines()) + "\n..." | |
185 | print(inline, file=outfile) |
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208 | print(inline, file=outfile) | |
186 | if get_output and output: |
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209 | if get_output and output: | |
187 | print(output, file=outfile) |
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210 | print(output, file=outfile) | |
188 |
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211 | |||
189 | if close_at_end: |
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212 | if close_at_end: | |
190 | outfile.close() |
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213 | outfile.close() | |
191 |
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214 | |||
192 | @line_magic |
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215 | @line_magic | |
193 | def recall(self, arg): |
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216 | def recall(self, arg): | |
194 | r"""Repeat a command, or get command to input line for editing. |
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217 | r"""Repeat a command, or get command to input line for editing. | |
195 |
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218 | |||
196 | %recall and %rep are equivalent. |
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219 | %recall and %rep are equivalent. | |
197 |
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220 | |||
198 | - %recall (no arguments): |
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221 | - %recall (no arguments): | |
199 |
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222 | |||
200 | Place a string version of last computation result (stored in the |
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223 | Place a string version of last computation result (stored in the | |
201 | special '_' variable) to the next input prompt. Allows you to create |
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224 | special '_' variable) to the next input prompt. Allows you to create | |
202 | elaborate command lines without using copy-paste:: |
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225 | elaborate command lines without using copy-paste:: | |
203 |
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226 | |||
204 | In[1]: l = ["hei", "vaan"] |
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227 | In[1]: l = ["hei", "vaan"] | |
205 | In[2]: "".join(l) |
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228 | In[2]: "".join(l) | |
206 | Out[2]: heivaan |
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229 | Out[2]: heivaan | |
207 | In[3]: %recall |
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230 | In[3]: %recall | |
208 | In[4]: heivaan_ <== cursor blinking |
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231 | In[4]: heivaan_ <== cursor blinking | |
209 |
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232 | |||
210 | %recall 45 |
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233 | %recall 45 | |
211 |
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234 | |||
212 | Place history line 45 on the next input prompt. Use %hist to find |
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235 | Place history line 45 on the next input prompt. Use %hist to find | |
213 | out the number. |
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236 | out the number. | |
214 |
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237 | |||
215 | %recall 1-4 |
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238 | %recall 1-4 | |
216 |
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239 | |||
217 | Combine the specified lines into one cell, and place it on the next |
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240 | Combine the specified lines into one cell, and place it on the next | |
218 | input prompt. See %history for the slice syntax. |
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241 | input prompt. See %history for the slice syntax. | |
219 |
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242 | |||
220 | %recall foo+bar |
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243 | %recall foo+bar | |
221 |
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244 | |||
222 | If foo+bar can be evaluated in the user namespace, the result is |
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245 | If foo+bar can be evaluated in the user namespace, the result is | |
223 | placed at the next input prompt. Otherwise, the history is searched |
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246 | placed at the next input prompt. Otherwise, the history is searched | |
224 | for lines which contain that substring, and the most recent one is |
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247 | for lines which contain that substring, and the most recent one is | |
225 | placed at the next input prompt. |
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248 | placed at the next input prompt. | |
226 | """ |
|
249 | """ | |
227 | if not arg: # Last output |
|
250 | if not arg: # Last output | |
228 | self.shell.set_next_input(str(self.shell.user_ns["_"])) |
|
251 | self.shell.set_next_input(str(self.shell.user_ns["_"])) | |
229 | return |
|
252 | return | |
230 | # Get history range |
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253 | # Get history range | |
231 | histlines = self.shell.history_manager.get_range_by_str(arg) |
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254 | histlines = self.shell.history_manager.get_range_by_str(arg) | |
232 | cmd = "\n".join(x[2] for x in histlines) |
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255 | cmd = "\n".join(x[2] for x in histlines) | |
233 | if cmd: |
|
256 | if cmd: | |
234 | self.shell.set_next_input(cmd.rstrip()) |
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257 | self.shell.set_next_input(cmd.rstrip()) | |
235 | return |
|
258 | return | |
236 |
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259 | |||
237 | try: # Variable in user namespace |
|
260 | try: # Variable in user namespace | |
238 | cmd = str(eval(arg, self.shell.user_ns)) |
|
261 | cmd = str(eval(arg, self.shell.user_ns)) | |
239 | except Exception: # Search for term in history |
|
262 | except Exception: # Search for term in history | |
240 | histlines = self.shell.history_manager.search("*"+arg+"*") |
|
263 | histlines = self.shell.history_manager.search("*"+arg+"*") | |
241 | for h in reversed([x[2] for x in histlines]): |
|
264 | for h in reversed([x[2] for x in histlines]): | |
242 | if 'recall' in h or 'rep' in h: |
|
265 | if 'recall' in h or 'rep' in h: | |
243 | continue |
|
266 | continue | |
244 | self.shell.set_next_input(h.rstrip()) |
|
267 | self.shell.set_next_input(h.rstrip()) | |
245 | return |
|
268 | return | |
246 | else: |
|
269 | else: | |
247 | self.shell.set_next_input(cmd.rstrip()) |
|
270 | self.shell.set_next_input(cmd.rstrip()) | |
248 | print("Couldn't evaluate or find in history:", arg) |
|
271 | print("Couldn't evaluate or find in history:", arg) | |
249 |
|
272 | |||
250 | @line_magic |
|
273 | @line_magic | |
251 | def rerun(self, parameter_s=''): |
|
274 | def rerun(self, parameter_s=''): | |
252 | """Re-run previous input |
|
275 | """Re-run previous input | |
253 |
|
276 | |||
254 | By default, you can specify ranges of input history to be repeated |
|
277 | By default, you can specify ranges of input history to be repeated | |
255 | (as with %history). With no arguments, it will repeat the last line. |
|
278 | (as with %history). With no arguments, it will repeat the last line. | |
256 |
|
279 | |||
257 | Options: |
|
280 | Options: | |
258 |
|
281 | |||
259 | -l <n> : Repeat the last n lines of input, not including the |
|
282 | -l <n> : Repeat the last n lines of input, not including the | |
260 | current command. |
|
283 | current command. | |
261 |
|
284 | |||
262 | -g foo : Repeat the most recent line which contains foo |
|
285 | -g foo : Repeat the most recent line which contains foo | |
263 | """ |
|
286 | """ | |
264 | opts, args = self.parse_options(parameter_s, 'l:g:', mode='string') |
|
287 | opts, args = self.parse_options(parameter_s, 'l:g:', mode='string') | |
265 | if "l" in opts: # Last n lines |
|
288 | if "l" in opts: # Last n lines | |
266 | n = int(opts['l']) |
|
289 | n = int(opts['l']) | |
267 | hist = self.shell.history_manager.get_tail(n) |
|
290 | hist = self.shell.history_manager.get_tail(n) | |
268 | elif "g" in opts: # Search |
|
291 | elif "g" in opts: # Search | |
269 | p = "*"+opts['g']+"*" |
|
292 | p = "*"+opts['g']+"*" | |
270 | hist = list(self.shell.history_manager.search(p)) |
|
293 | hist = list(self.shell.history_manager.search(p)) | |
271 | for l in reversed(hist): |
|
294 | for l in reversed(hist): | |
272 | if "rerun" not in l[2]: |
|
295 | if "rerun" not in l[2]: | |
273 | hist = [l] # The last match which isn't a %rerun |
|
296 | hist = [l] # The last match which isn't a %rerun | |
274 | break |
|
297 | break | |
275 | else: |
|
298 | else: | |
276 | hist = [] # No matches except %rerun |
|
299 | hist = [] # No matches except %rerun | |
277 | elif args: # Specify history ranges |
|
300 | elif args: # Specify history ranges | |
278 | hist = self.shell.history_manager.get_range_by_str(args) |
|
301 | hist = self.shell.history_manager.get_range_by_str(args) | |
279 | else: # Last line |
|
302 | else: # Last line | |
280 | hist = self.shell.history_manager.get_tail(1) |
|
303 | hist = self.shell.history_manager.get_tail(1) | |
281 | hist = [x[2] for x in hist] |
|
304 | hist = [x[2] for x in hist] | |
282 | if not hist: |
|
305 | if not hist: | |
283 | print("No lines in history match specification") |
|
306 | print("No lines in history match specification") | |
284 | return |
|
307 | return | |
285 | histlines = "\n".join(hist) |
|
308 | histlines = "\n".join(hist) | |
286 | print("=== Executing: ===") |
|
309 | print("=== Executing: ===") | |
287 | print(histlines) |
|
310 | print(histlines) | |
288 | print("=== Output: ===") |
|
311 | print("=== Output: ===") | |
289 | self.shell.run_cell("\n".join(hist), store_history=False) |
|
312 | self.shell.run_cell("\n".join(hist), store_history=False) |
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