setuptools git library

setuptools_git.py

# https://stackoverflow.com/questions/49847800/how-can-setuptools-dependency-links-be-used-with-the-latest-master-branch-of

setup(
    ...
    install_requires=[
        'krakenex;python_version<3',
        'krakenex3;python_version>=3',
    ],
    dependency_links = [
        "git+https://github.com/veox/python2-krakenex.git#egg=krakenex;python_version<'3.0'",
        "git+https://github.com/veox/python3-krakenex.git#egg=krakenex3;python_version>='3.0'",
    ],
    ...
)