windows下使用python 更换pip源为阿里源

import os

source = "http://mirrors.aliyun.com/pypi/simple/"
source_trusted = "mirrors.aliyun.com "
config = "[global]\nindex-url = " + source + "\n[install]\ntrusted-host=" + source_trusted
#pip_path = os.environ["USERPROFILE"] + "\\pip\\" #%APPDATA%
pip_path = os.environ["APPDATA"] + "\\pip\\"
print(pip_path)
if not os.path.exists(pip_path):
    os.makedirs(pip_path)
    print('%APPDATA%目录建立pip目录')
with open(pip_path + "pip.ini", "w+") as f:
            f.write(config)
            print(config)