python模块的搜索路径如何理解？

import sys

sys.path  属性可以获取路径列表

# 案例 p06.py

# 案例 p06.py

import sys

print(type(sys.path))

print(sys.path)

for p in sys.path:

    print(p)

<class 'list'>

['D:\\python\\project\\包管理', 'D:\\PyCharm Community Edition 2019.1.1\\helpers\\pydev', 'D:\\python\\project', 'D:\\PyCharm Community Edition 2019.1.1\\helpers\\third_party\\thriftpy', 'D:\\PyCharm Community Edition 2019.1.1\\helpers\\pydev', 'C:\\Users\\user\\.PyCharmCE2019.1\\system\\cythonExtensions', 'D:\\python\\project\\包管理', 'D:\\Anaconda3\\envs\\opp\\python37.zip', 'D:\\Anaconda3\\envs\\opp\\DLLs', 'D:\\Anaconda3\\envs\\opp\\lib', 'D:\\Anaconda3\\envs\\opp', 'D:\\Anaconda3\\envs\\opp\\lib\\site-packages']

D:\python\project\包管理

D:\PyCharm Community Edition 2019.1.1\helpers\pydev

D:\python\project

D:\PyCharm Community Edition 2019.1.1\helpers\third_party\thriftpy

D:\PyCharm Community Edition 2019.1.1\helpers\pydev

C:\Users\user\.PyCharmCE2019.1\system\cythonExtensions

D:\python\project\包管理

D:\Anaconda3\envs\opp\python37.zip

D:\Anaconda3\envs\opp\DLLs

D:\Anaconda3\envs\opp\lib

D:\Anaconda3\envs\opp

D:\Anaconda3\envs\opp\lib\site-packages

sys.path.append(dir)