ERROR: No matching distribution found for Cython==0.21.1

[Geonhee-LEE]

Hi, thanks for your contribution.

When I tried to install pip install ~, some error occurs like following:

ERROR: No matching distribution found for Cython==0.21.1

[chennnuo]

Hello, you can directly change Cython==0.21.1 in requirements.txt to Cython and try again.

[chennnuo]

Or modify your python version to 3.6.I recommend this way.