python寻找模块的路径顺序

Posted 2021-01-21 梁少华

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>>> import sys
>>> sys.path
[‘‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python37.zip‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload‘, ‘/Users/liangshaohua/Library/Python/3.7/lib/python/site-packages‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages‘]

python解释器会从当前目录开始，从左到右按顺序查找。前面的我们基本不用，我们经常用的也就是自己写的和site-packages,第三方和内置的都在site-packages里面。

增加模块路径

>>> sys.path.append(‘module_practice‘)
>>> import my_module
[‘‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python37.zip‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload‘, ‘/Users/liangshaohua/Library/Python/3.7/lib/python/site-packages‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages‘, ‘module_practice‘]

删除模块路径

>>> del sys.path[-1]
>>> sys.path
[‘‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python37.zip‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload‘, ‘/Users/liangshaohua/Library/Python/3.7/lib/python/site-packages‘, ‘/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages‘]