使用新安装的模块而无需重新启动交互式会话 [英] Using newly installed modules without restarting an interactive session

问题描述

在长时间的交互式会话中（使用ipython）我有时需要使用我尚未安装的模块。

During a long interactive session (using ipython) I sometimes need to use a module which I don't already have installed.

安装新模块后，模块在新的交互式会话中可导入，但在安装之前运行的会话中不可导入。由于我正在使用的内存中的所有变量，我不想重新启动会话...

After installing the new module, that module becomes importable in new interactive sessions, but not in the session that was running before the installation. I wouldn't want to restart the session due to all of the variables in memory that I'm working with...

如何才能获得此类以前运行的会话导入新模块？

How can I get such a previously running session to import the new module?

推荐答案

有两种方法可以手动导入Python中的东西（取决于你的python版本）。

There's two ways of manually importing things in Python (depending on your python version).

# Python2
import os
os.chdir('/path')
handle = __import__('scriptname') #without .py
handle.func()

或者你可以执行：

# Python3.3+
import importlib.machinery
loader = importlib.machinery.SourceFileLoader("namespace", '/path/scriptname.py') #including .py
handle = loader.load_module("namespace")
handle.func()

这在以前版本的Python3中有点不同，没有时间或访问权限现在安装旧版本，但我确实记得点击过尝试时几个问题导入，特别是在早期版本中重新加载模块。






重新加载这些模块以防它们发生变化（只是为了详细说明这个答案）：

This works a bit differently in previous version of Python3, Don't have the time or access to install older versions now but I do remember hitting a few issues when trying to import and especially reload modules in earlier versions.


To reload these modules in case they change (just to elaborate this answer):

# Python2
reload(handle)

# Python3
import imp
imp.reload(handle)

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