How to add search path in Python

Python adds search path

1. Add

to the program using sys.path, for example:

import sys
sys.path.append('/Users/username/Documents/')

sys.path

and you can use sys.path to output what is currently included directory.

2. Use the .pth file to add

Add a .pth file to the lib/python/site-packages/ directory in the directory where lib/python is installed.

What you need to pay attention to here is where the directory where python is installed is.

For example, if you use the my_project environment of the virtual environment in conda, it should be /Users/username/opt/anaconda3/envs/fealpy Add a mypath.pth file to the directory /lib/python3.8/site-packages. The content in

mypath.pth is the directory to be added:

/Users/username/Documents/
/Users/username/Downloads/

After adding, the same You can call sys.path in python to view:

import sys
sys.path

Attachment: python temporarily adds a search path

Put the address of your project in the sys.path list to facilitate the quick import of modules.

import os, sys

# 获取当前用户的home目录
module = os.path.expanduser('~')
# 打印当前用户的home目录
print(module)
# 定义home目录的搜索优先级,0为最高优先级
# sys.path.insert()加入的也是临时搜索路径，程序退出后失效。
sys.path.insert(0, module)
# 打印搜索路径
print(sys.path)

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