在 IPython 中自动重新加载模块 [英] Autoreload of modules in IPython

问题描述

有没有办法让 IPython 自动重新加载所有更改的代码?要么在 shell 中执行每一行之前，要么在特别请求时失败.我正在使用 IPython 和 SciPy 进行大量探索性编程，每次更改每个模块时都必须手动重新加载它，这非常痛苦.

Is there a way to have IPython automatically reload all changed code? Either before each line is executed in the shell or failing that when it is specifically requested to. I'm doing a lot of exploratory programming using IPython and SciPy and it's quite a pain to have to manually reload each module whenever I change it.

推荐答案

适用于 IPython 3.1、4.x 和 5.x 版

For IPython version 3.1, 4.x, and 5.x

%load_ext autoreload
%autoreload 2

然后您的模块将默认自动重新加载.这是文档:

Then your module will be auto-reloaded by default. This is the doc:

File:       ...my/python/path/lib/python2.7/site-packages/IPython/extensions/autoreload.py

Docstring:
``autoreload`` is an IPython extension that reloads modules
automatically before executing the line of code typed.

This makes for example the following workflow possible:

.. sourcecode:: ipython

   In [1]: %load_ext autoreload

   In [2]: %autoreload 2

   In [3]: from foo import some_function

   In [4]: some_function()
   Out[4]: 42

   In [5]: # open foo.py in an editor and change some_function to return 43

   In [6]: some_function()
   Out[6]: 43

The module was reloaded without reloading it explicitly, and the
object imported with ``from foo import ...`` was also updated.

有一个技巧:当您在使用 ipython 时忘记所有上述内容，请尝试:

There is a trick: when you forget all of the above when using ipython, just try:

import autoreload
?autoreload
# Then you get all the above

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