PIP version update timeout - download using domestic image

【 Problem description 】
In the use of pip Command download appium client when , Prompt update pip edition .

You are using pip version 10.0.1, however version 22.0.3 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

Follow the prompts to enter... On the command line python -m pip install --upgrade pip after ,pip Version update failed due to timeout .

raise ReadTimeoutError(self._pool, None, 'Read timed out.')

【 Cause analysis 】
pip The default download source is abroad , Connection timeout may occur in domestic use .

【 resolvent 】
python -m pip install --upgrade pip -i https://pypi.douban.com/simple

Download using domestic images , The new version can be seen pip Download it soon ！
pip --version Check pip edition

【 Images are commonly used in China 】
pip install Package name -i Mirror address Install third party libraries
tsinghua ：https://pypi.tuna.tsinghua.edu.cn/simple
douban ：http://pypi.douban.com/simple/
Alibaba cloud ：https://mirrors.aliyun.com/pypi/simple/
China University of science and technology ：https://pypi.mirrors.ustc.edu.cn/simple/