# https://pypi.org/project/pip/\r
# https://pip.pypa.io/en/stable/user_guide/#requirements-files\r
# https://pip.pypa.io/en/stable/reference/pip_install/#requirements-file-format\r
# https://pypi.org/project/pip/\r
# https://pip.pypa.io/en/stable/user_guide/#requirements-files\r
# https://pip.pypa.io/en/stable/reference/pip_install/#requirements-file-format\r