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1 | ============ |
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1 | ============ | |
2 | 8.x Series |
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2 | 8.x Series | |
3 | ============ |
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3 | ============ | |
4 |
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4 | |||
5 | IPython 8.0 |
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5 | IPython 8.0 | |
6 | ----------- |
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6 | ----------- | |
7 |
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7 | |||
8 | IPython 8.0 is still in alpha/beta stage. Please help us improve those release notes |
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8 | IPython 8.0 is still in alpha/beta stage. Please help us improve those release notes | |
9 | by sending PRs that modify docs/source/whatsnew/version8.rst |
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9 | by sending PRs that modify docs/source/whatsnew/version8.rst | |
10 |
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10 | |||
11 | IPython 8.0 is bringing a large number of new features and improvements to both the |
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11 | IPython 8.0 is bringing a large number of new features and improvements to both the | |
12 | user of the terminal and of the kernel via Jupyter. The removal of compatibility |
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12 | user of the terminal and of the kernel via Jupyter. The removal of compatibility | |
13 | with older version of Python is also the opportunity to do a couple of |
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13 | with older version of Python is also the opportunity to do a couple of | |
14 | performance improvement in particular with respect to startup time. |
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14 | performance improvement in particular with respect to startup time. | |
15 | The 8.x branch started diverging from its predecessor around IPython 7.12 |
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15 | The 8.x branch started diverging from its predecessor around IPython 7.12 | |
16 | (January 2020). |
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16 | (January 2020). | |
17 |
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17 | |||
18 | This release contains 250+ Pull Requests, in addition to many of the features |
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18 | This release contains 250+ Pull Requests, in addition to many of the features | |
19 | and backports that have made it to the 7.x branch. All PRs that went into this |
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19 | and backports that have made it to the 7.x branch. All PRs that went into this | |
20 | released are properly tagged with the 8.0 milestone if you wish to have a more |
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20 | released are properly tagged with the 8.0 milestone if you wish to have a more | |
21 | in depth look at the changes. |
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21 | in depth look at the changes. | |
22 |
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22 | |||
23 | Please fell free to send pull-requests to updates those notes after release, |
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23 | Please fell free to send pull-requests to updates those notes after release, | |
24 | I have likely forgotten a few things reviewing 250+ PRs. |
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24 | I have likely forgotten a few things reviewing 250+ PRs. | |
25 |
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25 | |||
26 | Dependencies changes/downstream packaging |
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26 | Dependencies changes/downstream packaging | |
27 | ----------------------------------------- |
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27 | ----------------------------------------- | |
28 |
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28 | |||
29 | Note that most of our building step have been changes to be (mostly) declarative |
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29 | Note that most of our building step have been changes to be (mostly) declarative | |
30 | and follow PEP 517, we are trying to completely remove ``setup.py`` (:ghpull:`13238`) and are |
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30 | and follow PEP 517, we are trying to completely remove ``setup.py`` (:ghpull:`13238`) and are | |
31 | looking for help to do so. |
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31 | looking for help to do so. | |
32 |
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32 | |||
33 | - Minimum supported ``traitlets`` version if now 5+ |
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33 | - Minimum supported ``traitlets`` version if now 5+ | |
34 | - we now require ``stack_data`` |
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34 | - we now require ``stack_data`` | |
35 | - Minimal Python is now 3.8 |
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35 | - Minimal Python is now 3.8 | |
36 | - ``nose`` is not a testing requirement anymore |
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36 | - ``nose`` is not a testing requirement anymore | |
37 | - ``pytest`` replaces nose. |
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37 | - ``pytest`` replaces nose. | |
38 | - ``iptest``/``iptest3`` cli entrypoints do not exists anymore. |
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38 | - ``iptest``/``iptest3`` cli entrypoints do not exists anymore. | |
39 | - minimum officially support ``numpy`` version has been bumped, but this should |
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39 | - minimum officially support ``numpy`` version has been bumped, but this should | |
40 | not have much effect on packaging. |
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40 | not have much effect on packaging. | |
41 |
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41 | |||
42 |
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42 | |||
43 | Deprecation and removal |
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43 | Deprecation and removal | |
44 | ----------------------- |
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44 | ----------------------- | |
45 |
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45 | |||
46 | We removed almost all features, arguments, functions, and modules that were |
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46 | We removed almost all features, arguments, functions, and modules that were | |
47 | marked as deprecated between IPython 1.0 and 5.0. As reminder 5.0 was released |
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47 | marked as deprecated between IPython 1.0 and 5.0. As reminder 5.0 was released | |
48 | in 2016, and 1.0 in 2013. Last release of the 5 branch was 5.10.0, in may 2020. |
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48 | in 2016, and 1.0 in 2013. Last release of the 5 branch was 5.10.0, in may 2020. | |
49 | The few remaining deprecated features we left have better deprecation warnings |
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49 | The few remaining deprecated features we left have better deprecation warnings | |
50 | or have been turned into explicit errors for better error messages. |
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50 | or have been turned into explicit errors for better error messages. | |
51 |
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51 | |||
52 | I will use this occasion to add the following requests to anyone emitting a |
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52 | I will use this occasion to add the following requests to anyone emitting a | |
53 | deprecation warning: |
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53 | deprecation warning: | |
54 |
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54 | |||
55 | - Please at at least ``stacklevel=2`` so that the warning is emitted into the |
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55 | - Please at at least ``stacklevel=2`` so that the warning is emitted into the | |
56 | caller context, and not the callee one. |
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56 | caller context, and not the callee one. | |
57 | - Please add **since which version** something is deprecated. |
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57 | - Please add **since which version** something is deprecated. | |
58 |
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58 | |||
59 | As a side note it is much easier to deal with conditional comparing to versions |
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59 | As a side note it is much easier to deal with conditional comparing to versions | |
60 | numbers than ``try/except`` when a functionality change with version. |
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60 | numbers than ``try/except`` when a functionality change with version. | |
61 |
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61 | |||
62 | I won't list all the removed features here, but modules like ``IPython.kernel``, |
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62 | I won't list all the removed features here, but modules like ``IPython.kernel``, | |
63 | which was just a shim module around ``ipykernel`` for the past 8 years have been |
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63 | which was just a shim module around ``ipykernel`` for the past 8 years have been | |
64 | remove, and so many other similar things that pre-date the name **Jupyter** |
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64 | remove, and so many other similar things that pre-date the name **Jupyter** | |
65 | itself. |
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65 | itself. | |
66 |
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66 | |||
67 | We no longer need to add ``IPyhton.extensions`` to the PYTHONPATH because that is being |
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67 | We no longer need to add ``IPyhton.extensions`` to the PYTHONPATH because that is being | |
68 | handled by ``load_extension``. |
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68 | handled by ``load_extension``. | |
69 |
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69 | |||
70 | We are also removing ``Cythonmagic``, ``sympyprinting`` and ``rmagic`` as they are now in |
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70 | We are also removing ``Cythonmagic``, ``sympyprinting`` and ``rmagic`` as they are now in | |
71 | other packages and no longer need to be inside IPython. |
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71 | other packages and no longer need to be inside IPython. | |
72 |
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72 | |||
73 |
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73 | |||
74 | Documentation |
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74 | Documentation | |
75 | ------------- |
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75 | ------------- | |
76 |
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76 | |||
77 | Majority of our docstrings have now been reformatted and automatically fixed by |
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77 | Majority of our docstrings have now been reformatted and automatically fixed by | |
78 | the experimental `VΓ©lin <https://pypi.org/project/velin/>`_ project, to conform |
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78 | the experimental `VΓ©lin <https://pypi.org/project/velin/>`_ project, to conform | |
79 | to numpydoc. |
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79 | to numpydoc. | |
80 |
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80 | |||
81 | Type annotations |
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81 | Type annotations | |
82 | ---------------- |
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82 | ---------------- | |
83 |
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83 | |||
84 | While IPython itself is highly dynamic and can't be completely typed, many of |
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84 | While IPython itself is highly dynamic and can't be completely typed, many of | |
85 | the function now have type annotation, and part of the codebase and now checked |
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85 | the function now have type annotation, and part of the codebase and now checked | |
86 | by mypy. |
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86 | by mypy. | |
87 |
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87 | |||
88 |
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88 | |||
89 | Featured changes |
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89 | Featured changes | |
90 | ---------------- |
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90 | ---------------- | |
91 |
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91 | |||
92 | Here is a features list of changes in IPython 8.0. This is of course non-exhaustive. |
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92 | Here is a features list of changes in IPython 8.0. This is of course non-exhaustive. | |
93 | Please note as well that many features have been added in the 7.x branch as well |
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93 | Please note as well that many features have been added in the 7.x branch as well | |
94 | (and hence why you want to read the 7.x what's new notes), in particular |
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94 | (and hence why you want to read the 7.x what's new notes), in particular | |
95 | features contributed by QuantStack (with respect to debugger protocol, and Xeus |
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95 | features contributed by QuantStack (with respect to debugger protocol, and Xeus | |
96 | Python), as well as many debugger features that I was please to implement as |
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96 | Python), as well as many debugger features that I was please to implement as | |
97 | part of my work at QuanSight and Sponsored by DE Shaw. |
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97 | part of my work at QuanSight and Sponsored by DE Shaw. | |
98 |
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98 | |||
99 | Better Tracebacks |
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99 | Better Tracebacks | |
100 | ~~~~~~~~~~~~~~~~~ |
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100 | ~~~~~~~~~~~~~~~~~ | |
101 |
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101 | |||
102 | The first on is the integration of the ``stack_data`` package; |
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102 | The first on is the integration of the ``stack_data`` package; | |
103 | which provide smarter informations in traceback; in particular it will highlight |
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103 | which provide smarter informations in traceback; in particular it will highlight | |
104 | the AST node where an error occurs which can help to quickly narrow down errors. |
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104 | the AST node where an error occurs which can help to quickly narrow down errors. | |
105 |
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105 | |||
106 | For example in the following snippet:: |
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106 | For example in the following snippet:: | |
107 |
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107 | |||
108 | def foo(i): |
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108 | def foo(i): | |
109 | x = [[[0]]] |
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109 | x = [[[0]]] | |
110 | return x[0][i][0] |
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110 | return x[0][i][0] | |
111 |
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111 | |||
112 |
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112 | |||
113 | def bar(): |
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113 | def bar(): | |
114 | return foo(0) + foo( |
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114 | return foo(0) + foo( | |
115 | 1 |
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115 | 1 | |
116 | ) + foo(2) |
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116 | ) + foo(2) | |
117 |
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117 | |||
118 |
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118 | |||
119 | Calling ``bar()`` would raise an ``IndexError`` on the return line of ``foo``, |
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119 | Calling ``bar()`` would raise an ``IndexError`` on the return line of ``foo``, | |
120 | IPython 8.0 is capable of telling you, where the index error occurs:: |
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120 | IPython 8.0 is capable of telling you, where the index error occurs:: | |
121 |
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121 | |||
122 |
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122 | |||
123 | IndexError |
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123 | IndexError | |
124 | Input In [2], in <module> |
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124 | Input In [2], in <module> | |
125 | ----> 1 bar() |
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125 | ----> 1 bar() | |
126 | ^^^^^ |
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126 | ^^^^^ | |
127 |
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127 | |||
128 | Input In [1], in bar() |
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128 | Input In [1], in bar() | |
129 | 6 def bar(): |
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129 | 6 def bar(): | |
130 | ----> 7 return foo(0) + foo( |
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130 | ----> 7 return foo(0) + foo( | |
131 | ^^^^ |
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131 | ^^^^ | |
132 | 8 1 |
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132 | 8 1 | |
133 | ^^^^^^^^ |
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133 | ^^^^^^^^ | |
134 | 9 ) + foo(2) |
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134 | 9 ) + foo(2) | |
135 | ^^^^ |
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135 | ^^^^ | |
136 |
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136 | |||
137 | Input In [1], in foo(i) |
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137 | Input In [1], in foo(i) | |
138 | 1 def foo(i): |
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138 | 1 def foo(i): | |
139 | 2 x = [[[0]]] |
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139 | 2 x = [[[0]]] | |
140 | ----> 3 return x[0][i][0] |
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140 | ----> 3 return x[0][i][0] | |
141 | ^^^^^^^ |
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141 | ^^^^^^^ | |
142 |
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142 | |||
143 | Corresponding location marked here with ``^`` will show up highlighted in |
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143 | Corresponding location marked here with ``^`` will show up highlighted in | |
144 | terminal and notebooks. |
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144 | terminal and notebooks. | |
145 |
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145 | |||
146 |
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146 | |||
147 | Autosuggestons |
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147 | Autosuggestons | |
148 | ~~~~~~~~~~~~~~ |
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148 | ~~~~~~~~~~~~~~ | |
149 |
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149 | |||
150 | Autosuggestion is a very useful feature available in `fish <https://fishshell.com/>`__, `zsh <https://en.wikipedia.org/wiki/Z_shell>`__, and `prompt-toolkit <https://python-prompt-toolkit.readthedocs.io/en/master/pages/asking_for_input.html#auto-suggestion>`__. |
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150 | Autosuggestion is a very useful feature available in `fish <https://fishshell.com/>`__, `zsh <https://en.wikipedia.org/wiki/Z_shell>`__, and `prompt-toolkit <https://python-prompt-toolkit.readthedocs.io/en/master/pages/asking_for_input.html#auto-suggestion>`__. | |
151 |
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151 | |||
152 | `Ptpython <https://github.com/prompt-toolkit/ptpython#ptpython>`__ allows users to enable this feature in |
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152 | `Ptpython <https://github.com/prompt-toolkit/ptpython#ptpython>`__ allows users to enable this feature in | |
153 | `ptpython/config.py <https://github.com/prompt-toolkit/ptpython/blob/master/examples/ptpython_config/config.py#L90>`__. |
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153 | `ptpython/config.py <https://github.com/prompt-toolkit/ptpython/blob/master/examples/ptpython_config/config.py#L90>`__. | |
154 |
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154 | |||
155 | This feature allows users to accept autosuggestions with ctrl e, ctrl f, |
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155 | This feature allows users to accept autosuggestions with ctrl e, ctrl f, | |
156 | or right arrow as described below. |
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156 | or right arrow as described below. | |
157 |
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157 | |||
158 | 1. Start ipython |
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158 | 1. Start ipython | |
159 |
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159 | |||
160 | .. image:: ../_images/8.0/auto_suggest_1_prompt_no_text.png |
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160 | .. image:: ../_images/8.0/auto_suggest_1_prompt_no_text.png | |
161 |
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161 | |||
162 | 2. Run ``print("hello")`` |
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162 | 2. Run ``print("hello")`` | |
163 |
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163 | |||
164 | .. image:: ../_images/8.0/auto_suggest_2_print_hello_suggest.png |
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164 | .. image:: ../_images/8.0/auto_suggest_2_print_hello_suggest.png | |
165 |
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165 | |||
166 | 3. start typing ``print`` again to see the autosuggestion |
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166 | 3. start typing ``print`` again to see the autosuggestion | |
167 |
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167 | |||
168 | .. image:: ../_images/8.0/auto_suggest_3_print_hello_suggest.png |
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168 | .. image:: ../_images/8.0/auto_suggest_3_print_hello_suggest.png | |
169 |
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169 | |||
170 | 4. Press ``ctrl-f``, or ``ctrl-e``, or ``right-arrow`` to accept the suggestion |
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170 | 4. Press ``ctrl-f``, or ``ctrl-e``, or ``right-arrow`` to accept the suggestion | |
171 |
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171 | |||
172 | .. image:: ../_images/8.0/auto_suggest_4_print_hello.png |
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172 | .. image:: ../_images/8.0/auto_suggest_4_print_hello.png | |
173 |
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173 | |||
174 | You can also complete word by word: |
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174 | You can also complete word by word: | |
175 |
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175 | |||
176 | 1. Run ``def say_hello(): print("hello")`` |
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176 | 1. Run ``def say_hello(): print("hello")`` | |
177 |
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177 | |||
178 | .. image:: ../_images/8.0/auto_suggest_second_prompt.png |
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178 | .. image:: ../_images/8.0/auto_suggest_second_prompt.png | |
179 |
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179 | |||
180 | 2. Start typing the first letter if ``def`` to see the autosuggestion |
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180 | 2. Start typing the first letter if ``def`` to see the autosuggestion | |
181 |
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181 | |||
182 | .. image:: ../_images/8.0/auto_suggest_d_phantom.png |
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182 | .. image:: ../_images/8.0/auto_suggest_d_phantom.png | |
183 |
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183 | |||
184 | 3. Press ``alt-f`` (or ``escape`` followed by ``f``), to accept the first word of the suggestion |
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184 | 3. Press ``alt-f`` (or ``escape`` followed by ``f``), to accept the first word of the suggestion | |
185 |
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185 | |||
186 | .. image:: ../_images/8.0/auto_suggest_def_phantom.png |
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186 | .. image:: ../_images/8.0/auto_suggest_def_phantom.png | |
187 |
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187 | |||
188 | Importantly, this feature does not interfere with tab completion: |
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188 | Importantly, this feature does not interfere with tab completion: | |
189 |
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189 | |||
190 | 1. After running ``def say_hello(): print("hello")``, press d |
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190 | 1. After running ``def say_hello(): print("hello")``, press d | |
191 |
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191 | |||
192 | .. image:: ../_images/8.0/auto_suggest_d_phantom.png |
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192 | .. image:: ../_images/8.0/auto_suggest_d_phantom.png | |
193 |
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193 | |||
194 | 2. Press Tab to start tab completion |
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194 | 2. Press Tab to start tab completion | |
195 |
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195 | |||
196 | .. image:: ../_images/8.0/auto_suggest_d_completions.png |
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196 | .. image:: ../_images/8.0/auto_suggest_d_completions.png | |
197 |
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197 | |||
198 | 3A. Press Tab again to select the first option |
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198 | 3A. Press Tab again to select the first option | |
199 |
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199 | |||
200 | .. image:: ../_images/8.0/auto_suggest_def_completions.png |
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200 | .. image:: ../_images/8.0/auto_suggest_def_completions.png | |
201 |
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201 | |||
202 | 3B. Press ``alt f`` (``escape``, ``f``) to accept to accept the first word of the suggestion |
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202 | 3B. Press ``alt f`` (``escape``, ``f``) to accept to accept the first word of the suggestion | |
203 |
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203 | |||
204 | .. image:: ../_images/8.0/auto_suggest_def_phantom.png |
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204 | .. image:: ../_images/8.0/auto_suggest_def_phantom.png | |
205 |
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205 | |||
206 | 3C. Press ``ctrl-f`` or ``ctrl-e`` to accept the entire suggestion |
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206 | 3C. Press ``ctrl-f`` or ``ctrl-e`` to accept the entire suggestion | |
207 |
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207 | |||
208 | .. image:: ../_images/8.0/auto_suggest_match_parens.png |
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208 | .. image:: ../_images/8.0/auto_suggest_match_parens.png | |
209 |
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209 | |||
210 |
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210 | |||
211 | Currently, autosuggestions are only shown in the emacs or vi insert editing modes: |
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211 | Currently, autosuggestions are only shown in the emacs or vi insert editing modes: | |
212 |
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212 | |||
213 | - The ctrl e, ctrl f, and alt f shortcuts work by default in emacs mode. |
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213 | - The ctrl e, ctrl f, and alt f shortcuts work by default in emacs mode. | |
214 | - To use these shortcuts in vi insert mode, you will have to create `custom keybindings in your config.py <https://github.com/mskar/setup/commit/2892fcee46f9f80ef7788f0749edc99daccc52f4/>`__. |
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214 | - To use these shortcuts in vi insert mode, you will have to create `custom keybindings in your config.py <https://github.com/mskar/setup/commit/2892fcee46f9f80ef7788f0749edc99daccc52f4/>`__. | |
215 |
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215 | |||
216 |
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216 | |||
217 | Show pinfo information in ipdb using "?" and "??" |
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217 | Show pinfo information in ipdb using "?" and "??" | |
218 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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218 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
219 |
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219 | |||
220 | In IPDB, it is now possible to show the information about an object using "?" |
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220 | In IPDB, it is now possible to show the information about an object using "?" | |
221 | and "??", in much the same way it can be done when using the IPython prompt:: |
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221 | and "??", in much the same way it can be done when using the IPython prompt:: | |
222 |
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222 | |||
223 | ipdb> partial? |
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223 | ipdb> partial? | |
224 | Init signature: partial(self, /, *args, **kwargs) |
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224 | Init signature: partial(self, /, *args, **kwargs) | |
225 | Docstring: |
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225 | Docstring: | |
226 | partial(func, *args, **keywords) - new function with partial application |
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226 | partial(func, *args, **keywords) - new function with partial application | |
227 | of the given arguments and keywords. |
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227 | of the given arguments and keywords. | |
228 | File: ~/.pyenv/versions/3.8.6/lib/python3.8/functools.py |
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228 | File: ~/.pyenv/versions/3.8.6/lib/python3.8/functools.py | |
229 | Type: type |
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229 | Type: type | |
230 | Subclasses: |
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230 | Subclasses: | |
231 |
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231 | |||
232 | Previously, ``pinfo`` or ``pinfo2`` command had to be used for this purpose. |
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232 | Previously, ``pinfo`` or ``pinfo2`` command had to be used for this purpose. | |
233 |
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233 | |||
234 |
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234 | |||
235 | Autoreload 3 feature |
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235 | Autoreload 3 feature | |
236 | ~~~~~~~~~~~~~~~~~~~~ |
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236 | ~~~~~~~~~~~~~~~~~~~~ | |
237 |
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237 | |||
238 | Example: When an IPython session is ran with the 'autoreload' extension loaded, |
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238 | Example: When an IPython session is ran with the 'autoreload' extension loaded, | |
239 | you will now have the option '3' to select which means the following: |
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239 | you will now have the option '3' to select which means the following: | |
240 |
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240 | |||
241 | 1. replicate all functionality from option 2 |
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241 | 1. replicate all functionality from option 2 | |
242 | 2. autoload all new funcs/classes/enums/globals from the module when they are added |
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242 | 2. autoload all new funcs/classes/enums/globals from the module when they are added | |
243 | 3. autoload all newly imported funcs/classes/enums/globals from external modules |
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243 | 3. autoload all newly imported funcs/classes/enums/globals from external modules | |
244 |
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244 | |||
245 | Try ``%autoreload 3`` in an IPython session after running ``%load_ext autoreload`` |
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245 | Try ``%autoreload 3`` in an IPython session after running ``%load_ext autoreload`` | |
246 |
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246 | |||
247 | For more information please see the following unit test : ``extensions/tests/test_autoreload.py:test_autoload_newly_added_objects`` |
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247 | For more information please see the following unit test : ``extensions/tests/test_autoreload.py:test_autoload_newly_added_objects`` | |
248 |
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248 | |||
249 |
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249 | |||
250 |
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250 | |||
251 |
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251 | |||
252 | History Range Glob feature |
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252 | History Range Glob feature | |
253 | ~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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253 | ~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
254 |
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254 | |||
255 | Previously, when using ``%history``, users could specify either |
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255 | Previously, when using ``%history``, users could specify either | |
256 | a range of sessions and lines, for example: |
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256 | a range of sessions and lines, for example: | |
257 |
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257 | |||
258 | .. code-block:: python |
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258 | .. code-block:: python | |
259 |
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259 | |||
260 | ~8/1-~6/5 # see history from the first line of 8 sessions ago, |
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260 | ~8/1-~6/5 # see history from the first line of 8 sessions ago, | |
261 | # to the fifth line of 6 sessions ago.`` |
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261 | # to the fifth line of 6 sessions ago.`` | |
262 |
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262 | |||
263 | Or users could specify a glob pattern: |
|
263 | Or users could specify a glob pattern: | |
264 |
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264 | |||
265 | .. code-block:: python |
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265 | .. code-block:: python | |
266 |
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266 | |||
267 | -g <pattern> # glob ALL history for the specified pattern. |
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267 | -g <pattern> # glob ALL history for the specified pattern. | |
268 |
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268 | |||
269 | However users could *not* specify both. |
|
269 | However users could *not* specify both. | |
270 |
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270 | |||
271 | If a user *did* specify both a range and a glob pattern, |
|
271 | If a user *did* specify both a range and a glob pattern, | |
272 | then the glob pattern would be used (globbing *all* history) *and the range would be ignored*. |
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272 | then the glob pattern would be used (globbing *all* history) *and the range would be ignored*. | |
273 |
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273 | |||
274 | With this enhancement, if a user specifies both a range and a glob pattern, then the glob pattern will be applied to the specified range of history. |
|
274 | With this enhancement, if a user specifies both a range and a glob pattern, then the glob pattern will be applied to the specified range of history. | |
275 |
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275 | |||
276 | Don't start a multi line cell with sunken parenthesis |
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276 | Don't start a multi line cell with sunken parenthesis | |
277 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
277 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
278 |
|
278 | |||
279 | From now on IPython will not ask for the next line of input when given a single |
|
279 | From now on IPython will not ask for the next line of input when given a single | |
280 | line with more closing than opening brackets. For example, this means that if |
|
280 | line with more closing than opening brackets. For example, this means that if | |
281 | you (mis)type ``]]`` instead of ``[]``, a ``SyntaxError`` will show up, instead of |
|
281 | you (mis)type ``]]`` instead of ``[]``, a ``SyntaxError`` will show up, instead of | |
282 | the ``...:`` prompt continuation. |
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282 | the ``...:`` prompt continuation. | |
283 |
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283 | |||
284 | IPython shell for ipdb interact |
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284 | IPython shell for ipdb interact | |
285 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
285 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
286 |
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286 | |||
287 | The ipdb ``interact`` starts an IPython shell instead of Python's built-in ``code.interact()``. |
|
287 | The ipdb ``interact`` starts an IPython shell instead of Python's built-in ``code.interact()``. | |
288 |
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288 | |||
289 | Automatic Vi prompt stripping |
|
289 | Automatic Vi prompt stripping | |
290 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
290 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
291 |
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291 | |||
292 | When pasting code into IPython, it will strip the leading prompt characters if |
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292 | When pasting code into IPython, it will strip the leading prompt characters if | |
293 | there are any. For example, you can paste the following code into the console - |
|
293 | there are any. For example, you can paste the following code into the console - | |
294 | it will still work, even though each line is prefixed with prompts (`In`, |
|
294 | it will still work, even though each line is prefixed with prompts (`In`, | |
295 | `Out`):: |
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295 | `Out`):: | |
296 |
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296 | |||
297 | In [1]: 2 * 2 == 4 |
|
297 | In [1]: 2 * 2 == 4 | |
298 | Out[1]: True |
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298 | Out[1]: True | |
299 |
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299 | |||
300 | In [2]: print("This still works as pasted") |
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300 | In [2]: print("This still works as pasted") | |
301 |
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301 | |||
302 |
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302 | |||
303 | Previously, this was not the case for the Vi-mode prompts:: |
|
303 | Previously, this was not the case for the Vi-mode prompts:: | |
304 |
|
304 | |||
305 | In [1]: [ins] In [13]: 2 * 2 == 4 |
|
305 | In [1]: [ins] In [13]: 2 * 2 == 4 | |
306 | ...: Out[13]: True |
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306 | ...: Out[13]: True | |
307 | ...: |
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307 | ...: | |
308 | File "<ipython-input-1-727bb88eaf33>", line 1 |
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308 | File "<ipython-input-1-727bb88eaf33>", line 1 | |
309 | [ins] In [13]: 2 * 2 == 4 |
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309 | [ins] In [13]: 2 * 2 == 4 | |
310 | ^ |
|
310 | ^ | |
311 | SyntaxError: invalid syntax |
|
311 | SyntaxError: invalid syntax | |
312 |
|
312 | |||
313 | This is now fixed, and Vi prompt prefixes - ``[ins]`` and ``[nav]`` - are |
|
313 | This is now fixed, and Vi prompt prefixes - ``[ins]`` and ``[nav]`` - are | |
314 | skipped just as the normal ``In`` would be. |
|
314 | skipped just as the normal ``In`` would be. | |
315 |
|
315 | |||
316 | IPython shell can be started in the Vi mode using ``ipython --TerminalInteractiveShell.editing_mode=vi``, |
|
316 | IPython shell can be started in the Vi mode using ``ipython --TerminalInteractiveShell.editing_mode=vi``, | |
317 | You should be able to change mode dynamically with ``%config TerminalInteractiveShell.editing_mode='vi'`` |
|
317 | You should be able to change mode dynamically with ``%config TerminalInteractiveShell.editing_mode='vi'`` | |
318 |
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318 | |||
319 | Empty History Ranges |
|
319 | Empty History Ranges | |
320 | ~~~~~~~~~~~~~~~~~~~~ |
|
320 | ~~~~~~~~~~~~~~~~~~~~ | |
321 |
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321 | |||
322 | A number of magics that take history ranges can now be used with an empty |
|
322 | A number of magics that take history ranges can now be used with an empty | |
323 | range. These magics are: |
|
323 | range. These magics are: | |
324 |
|
324 | |||
325 | * ``%save`` |
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325 | * ``%save`` | |
326 | * ``%load`` |
|
326 | * ``%load`` | |
327 | * ``%pastebin`` |
|
327 | * ``%pastebin`` | |
328 | * ``%pycat`` |
|
328 | * ``%pycat`` | |
329 |
|
329 | |||
330 | Using them this way will make them take the history of the current session up |
|
330 | Using them this way will make them take the history of the current session up | |
331 | to the point of the magic call (such that the magic itself will not be |
|
331 | to the point of the magic call (such that the magic itself will not be | |
332 | included). |
|
332 | included). | |
333 |
|
333 | |||
334 | Therefore it is now possible to save the whole history to a file using simple |
|
334 | Therefore it is now possible to save the whole history to a file using simple | |
335 | ``%save <filename>``, load and edit it using ``%load`` (makes for a nice usage |
|
335 | ``%save <filename>``, load and edit it using ``%load`` (makes for a nice usage | |
336 | when followed with :kbd:`F2`), send it to dpaste.org using ``%pastebin``, or |
|
336 | when followed with :kbd:`F2`), send it to dpaste.org using ``%pastebin``, or | |
337 | view the whole thing syntax-highlighted with a single ``%pycat``. |
|
337 | view the whole thing syntax-highlighted with a single ``%pycat``. | |
338 |
|
338 | |||
339 | Traceback improvements |
|
339 | Traceback improvements | |
340 | ~~~~~~~~~~~~~~~~~~~~~~ |
|
340 | ~~~~~~~~~~~~~~~~~~~~~~ | |
341 |
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341 | |||
342 |
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342 | |||
343 | Previously, error tracebacks for errors happening in code cells were showing a hash, the one used for compiling the Python AST:: |
|
343 | Previously, error tracebacks for errors happening in code cells were showing a hash, the one used for compiling the Python AST:: | |
344 |
|
344 | |||
345 | In [1]: def foo(): |
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345 | In [1]: def foo(): | |
346 | ...: return 3 / 0 |
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346 | ...: return 3 / 0 | |
347 | ...: |
|
347 | ...: | |
348 |
|
348 | |||
349 | In [2]: foo() |
|
349 | In [2]: foo() | |
350 | --------------------------------------------------------------------------- |
|
350 | --------------------------------------------------------------------------- | |
351 | ZeroDivisionError Traceback (most recent call last) |
|
351 | ZeroDivisionError Traceback (most recent call last) | |
352 | <ipython-input-2-c19b6d9633cf> in <module> |
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352 | <ipython-input-2-c19b6d9633cf> in <module> | |
353 | ----> 1 foo() |
|
353 | ----> 1 foo() | |
354 |
|
354 | |||
355 | <ipython-input-1-1595a74c32d5> in foo() |
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355 | <ipython-input-1-1595a74c32d5> in foo() | |
356 | 1 def foo(): |
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356 | 1 def foo(): | |
357 | ----> 2 return 3 / 0 |
|
357 | ----> 2 return 3 / 0 | |
358 | 3 |
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358 | 3 | |
359 |
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359 | |||
360 | ZeroDivisionError: division by zero |
|
360 | ZeroDivisionError: division by zero | |
361 |
|
361 | |||
362 | The error traceback is now correctly formatted, showing the cell number in which the error happened:: |
|
362 | The error traceback is now correctly formatted, showing the cell number in which the error happened:: | |
363 |
|
363 | |||
364 | In [1]: def foo(): |
|
364 | In [1]: def foo(): | |
365 | ...: return 3 / 0 |
|
365 | ...: return 3 / 0 | |
366 | ...: |
|
366 | ...: | |
367 |
|
367 | |||
368 | Input In [2]: foo() |
|
368 | Input In [2]: foo() | |
369 | --------------------------------------------------------------------------- |
|
369 | --------------------------------------------------------------------------- | |
370 | ZeroDivisionError Traceback (most recent call last) |
|
370 | ZeroDivisionError Traceback (most recent call last) | |
371 | input In [2], in <module> |
|
371 | input In [2], in <module> | |
372 | ----> 1 foo() |
|
372 | ----> 1 foo() | |
373 |
|
373 | |||
374 | Input In [1], in foo() |
|
374 | Input In [1], in foo() | |
375 | 1 def foo(): |
|
375 | 1 def foo(): | |
376 | ----> 2 return 3 / 0 |
|
376 | ----> 2 return 3 / 0 | |
377 |
|
377 | |||
378 | ZeroDivisionError: division by zero |
|
378 | ZeroDivisionError: division by zero | |
379 |
|
379 | |||
380 | Miscellaneous |
|
380 | Miscellaneous | |
381 | ~~~~~~~~~~~~~ |
|
381 | ~~~~~~~~~~~~~ | |
382 |
|
382 | |||
383 | - ``~`` is now expanded when part of a path in most magics :ghpull:`13385` |
|
383 | - ``~`` is now expanded when part of a path in most magics :ghpull:`13385` | |
384 | - ``%/%%timeit`` magic now adds comma every thousands to make reading long number easier :ghpull:`13379` |
|
384 | - ``%/%%timeit`` magic now adds comma every thousands to make reading long number easier :ghpull:`13379` | |
385 | - ``"info"`` messages can now be customised to hide some fields :ghpull:`13343` |
|
385 | - ``"info"`` messages can now be customised to hide some fields :ghpull:`13343` | |
386 | - ``collections.UserList`` now pretty-prints :ghpull:`13320` |
|
386 | - ``collections.UserList`` now pretty-prints :ghpull:`13320` | |
387 | - The debugger now have a persistent history, which should make it less |
|
387 | - The debugger now have a persistent history, which should make it less | |
388 | annoying to retype commands :ghpull:`13246` |
|
388 | annoying to retype commands :ghpull:`13246` | |
389 | - ``!pip`` ``!conda`` ``!cd`` or ``!ls`` are likely doing the wrong thing, we |
|
389 | - ``!pip`` ``!conda`` ``!cd`` or ``!ls`` are likely doing the wrong thing, we | |
390 | now warn users if they use it. :ghpull:`12954` |
|
390 | now warn users if they use it. :ghpull:`12954` | |
391 | - make ``%precision`` work for ``numpy.float64`` type :ghpull:`12902` |
|
391 | - make ``%precision`` work for ``numpy.float64`` type :ghpull:`12902` | |
392 |
|
392 | |||
393 |
|
393 | |||
394 |
|
394 | |||
395 |
|
395 | |||
396 | Numfocus Small Developer Grant |
|
396 | Numfocus Small Developer Grant | |
397 | ------------------------------ |
|
397 | ------------------------------ | |
398 |
|
398 | |||
399 | To prepare for Python 3.10 we have also started working on removing reliance and |
|
399 | To prepare for Python 3.10 we have also started working on removing reliance and | |
400 | any dependency that is not Python 3.10 compatible; that include migrating our |
|
400 | any dependency that is not Python 3.10 compatible; that include migrating our | |
401 | test suite to pytest, and starting to remove nose. This also mean that the |
|
401 | test suite to pytest, and starting to remove nose. This also mean that the | |
402 | ``iptest`` command is now gone, and all testing is via pytest. |
|
402 | ``iptest`` command is now gone, and all testing is via pytest. | |
403 |
|
403 | |||
404 |
This was in |
|
404 | This was in large part thanks to the NumFOCUS Small Developer grant, which enabled us to | |
405 |
allocate 4000 to hire `Nikita Kniazev (@Kojoley) <https://github.com/Kojoley>` |
|
405 | allocate \$4000 to hire `Nikita Kniazev (@Kojoley) <https://github.com/Kojoley>`, | |
406 | who did a fantastic job at updating our code base, migrating to pytest, pushing |
|
406 | who did a fantastic job at updating our code base, migrating to pytest, pushing | |
407 | our coverage, and fixing a large number of bugs. I highly recommend contacting |
|
407 | our coverage, and fixing a large number of bugs. I highly recommend contacting | |
408 | them if you need help with C++ and Python projects |
|
408 | them if you need help with C++ and Python projects | |
409 |
|
409 | |||
410 | You can find all relevant issues and PRs with the SDG 2021 tag `<https://github.com/ipython/ipython/issues?q=label%3A%22Numfocus+SDG+2021%22+>`__ |
|
410 | You can find all relevant issues and PRs with the SDG 2021 tag `<https://github.com/ipython/ipython/issues?q=label%3A%22Numfocus+SDG+2021%22+>`__ | |
411 |
|
411 | |||
412 | Removing support for Older Python |
|
412 | Removing support for Older Python | |
413 | --------------------------------- |
|
413 | --------------------------------- | |
414 |
|
414 | |||
415 |
|
415 | |||
416 | We are also removing support for Python up to 3.7 allowing internal code to use more |
|
416 | We are also removing support for Python up to 3.7 allowing internal code to use more | |
417 | efficient ``pathlib``, and make better use of type annotations. |
|
417 | efficient ``pathlib``, and make better use of type annotations. | |
418 |
|
418 | |||
419 | .. image:: ../_images/8.0/pathlib_pathlib_everywhere.jpg |
|
419 | .. image:: ../_images/8.0/pathlib_pathlib_everywhere.jpg | |
420 | :alt: "Meme image of Toy Story with Woody and Buzz, with the text 'pathlib, pathlib everywhere'" |
|
420 | :alt: "Meme image of Toy Story with Woody and Buzz, with the text 'pathlib, pathlib everywhere'" | |
421 |
|
421 | |||
422 |
|
422 | |||
423 | We have about 34 PRs only to update some logic tu update some function from managing strings to |
|
423 | We have about 34 PRs only to update some logic tu update some function from managing strings to | |
424 | using Pathlib. |
|
424 | using Pathlib. | |
425 |
|
425 | |||
426 | The completer has also seen significant updates and make use of newer Jedi API |
|
426 | The completer has also seen significant updates and make use of newer Jedi API | |
427 | offering faster and more reliable tab completion. |
|
427 | offering faster and more reliable tab completion. | |
428 |
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428 |
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