--extra-index-url https://mirrors.tencent.com/pypi/simple
# pip config set global.index-url https://mirrors.tencent.com/pypi/simple
# pip config unset global.index-url
# python -m pip install --upgrade --force-reinstall pip -i https://mirrors.tencent.com/pypi/simple
# pip install -r ./requirements.txt -i https://mirrors.tencent.com/pypi/simple
#  --default-timeout=100
#------------------------------------------------------------------------------------------------------------
