python基础----sys.path系统环境变量

如果你发现你在某个地方写的文件（包）import错误，你就可以看看这个sys.path是否囊括了你那批文件的根目录:

>>> import sys
>>> print(sys.path)
['', 'C:\\Python37\\Lib\\idlelib', 'C:\\Python37\\python37.zip', 'C:\\Python37\\DLLs', 'C:\\Python37\\lib', 'C:\\Python37', 'C:\\Users\\ASUS\\AppData\\Roaming\\Python\\Python37\\site-packages', 'C:\\Python37\\lib\\site-packages', 'C:\\Python37\\lib\\site-packages\\win32', 'C:\\Python37\\lib\\site-packages\\win32\\lib', 'C:\\Python37\\lib\\site-packages\\Pythonwin']
>>> for i in sys.path:
	print(i)

	

C:\Python37\Lib\idlelib
C:\Python37\python37.zip
C:\Python37\DLLs
C:\Python37\lib
C:\Python37
C:\Users\ASUS\AppData\Roaming\Python\Python37\site-packages
C:\Python37\lib\site-packages
C:\Python37\lib\site-packages\win32
C:\Python37\lib\site-packages\win32\lib
C:\Python37\lib\site-packages\Pythonwin
>>>