在没有OS模块的Python中设置环境变量 [英] Setting environment variable in Python without OS module

问题描述

我正在使用一个由于大小限制而不使用操作系统模块的python，而且我试图让它从一个目录启动时导入一个模块。从我的理解，我可以使用PYTHONPATH设置它，但是如何在没有os模块的情况下设置该变量？

I'm using a build of python that doesn't use the OS module because of size constraints, and I'm trying to have it import a module on startup from a directory. From what I understand I can set this using PYTHONPATH, but how would I go about setting that variable without the os module?

推荐答案

你想要 PYTHONSTARTUP ，您可以在其中创建启动文件，您可以导入任何要启动python shell时导入的模块。

You want PYTHONSTARTUP, where you create a startup file and you can import whatever modules you want which will be imported when you start a python shell.

在我的主目录中，我有一个文件 .startup.py ，看起来像下面这样：

In my home directory I have a file .startup.py that looks like the folowing:

import datetime, os, pprint, sys, time
print("(modules imported datetime, os, pprint sys, time)")

每次启动shell时，都会导入模块：

Every time I start a shell the modules are all imported:

~$ ipython
Python 3.4.0 (default, Apr 11 2014, 13:05:11) 
Type "copyright", "credits" or "license" for more information.

IPython 3.0.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.
(imported datetime, os, pprint, re, sys, time)

在ubuntu我在我的 .bashrc 中导出PYTHONSTARTUP = $ HOME / .startup.py 。

On ubuntu I have export PYTHONSTARTUP=$HOME/.startup.py in my .bashrc.

我在名为 my_mods 的目录中保留了几个不同的模块，将其添加到我的pythonpath中我添加了 export PYTHONPATH = $ HOME / my_mods 再次在我的 .bashrc 。

I keep a few different modules in a directory called my_mods, to add it to my pythonpath I added export PYTHONPATH=$HOME/my_mods again in my .bashrc.

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