pip install on Python2.7 not working
pip install on Python2.7 fails with the error:

RuntimeError: Python version >= 3.5 required.

this is because numpy has a release version 1.7 which requires 3.5 or above

[https://github.com/numpy/numpy/blob/maintenance/1.17.x/setup.py](url)

is it okay to add a dependency check in setup.py? i can do that and submit for review or let me know how do you suggest we address this?