I am using Mac OSX ( E-Caption- 10.11.2 ).
pip install PyGreSQL
Worked for me.
> Collecting PyGreSQL Downloading PyGreSQL-4.1.1.tgz (100kB)
> 100% |████████████████████████████████| 102kB 2.9MB/s
>
> Building wheels for collected packages: PyGreSQL
> Running setup.py
> bdist_wheel for PyGreSQL Stored in directory:
> <blah>441bbb4b4f3da670bbd24afa6a8a887cb1b16359dc4c26f445 Successfully
> built PyGreSQL Installing collected packages: PyGreSQL Successfully
> installed PyGreSQL-4.1.1