Just a heads up, I got an error also just now when trying to download from pip3

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Here is the error that I received.

Collecting pypreprocessor
  Downloading https://files.pythonhosted.org/packages/27/54/c8daff18372422e66fb3c474af4b9fb3c0e9fc94685f4948d990d7080b08/pypreprocessor-0.7.7.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\Home\AppData\Local\Temp\pip-install-rj8udibl\pypreprocessor\setup.py", line 16, in <module>
        from tests import RunTests
      File "C:\Users\Home\AppData\Local\Temp\pip-install-rj8udibl\pypreprocessor\tests\__init__.py", line 11, in <module>
        from tests import maintest
    ImportError: cannot import name 'maintest' from 'tests' (C:\Users\Home\AppData\Local\Temp\pip-install-rj8udibl\pypreprocessor\tests\__init__.py)

    ----------------------------------------