How install Flask correctly for python 3.7 to run this github project?
Seems like an issue with the certificate verification. You can try to working around it by adding pypi.org (the registry) and files.pythonhosted.org (the file storage) as trusted hosts.
Try this:
pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org Flask==0.10.1The issue may also be fixed by re-installing pip