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/home/pvittet/novajoj/venv/bin/pip run on Thu Sep 30 23:18:32 2021
Downloading/unpacking flask
  Getting page https://pypi.python.org/simple/flask/
  Could not fetch URL https://pypi.python.org/simple/flask/: connection error: ('Connection aborted.', OSError(97, 'Address family not supported by protocol'))
  Will skip URL https://pypi.python.org/simple/flask/ when looking for download links for flask
  Getting page https://pypi.python.org/simple/
  Could not fetch URL https://pypi.python.org/simple/: connection error: ('Connection aborted.', OSError(97, 'Address family not supported by protocol'))
  Will skip URL https://pypi.python.org/simple/ when looking for download links for flask
  Cannot fetch index base URL https://pypi.python.org/simple/
  URLs to search for versions for flask:
  * https://pypi.python.org/simple/flask/
  Getting page https://pypi.python.org/simple/flask/
  Could not fetch URL https://pypi.python.org/simple/flask/: connection error: ('Connection aborted.', OSError(97, 'Address family not supported by protocol'))
  Will skip URL https://pypi.python.org/simple/flask/ when looking for download links for flask
  Could not find any downloads that satisfy the requirement flask
Cleaning up...
No distributions at all found for flask
Exception information:
Traceback (most recent call last):
  File "/home/pvittet/novajoj/venv/lib/python3.4/site-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/home/pvittet/novajoj/venv/lib/python3.4/site-packages/pip/commands/install.py", line 290, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/home/pvittet/novajoj/venv/lib/python3.4/site-packages/pip/req.py", line 1178, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/home/pvittet/novajoj/venv/lib/python3.4/site-packages/pip/index.py", line 277, in find_requirement
    raise DistributionNotFound('No distributions at all found for %s' % req)
pip.exceptions.DistributionNotFound: No distributions at all found for flask