capybara/virtualenv/lib/python2.7/site-packages/wheel/pep425tags.py
def get_impl_ver():
    """Return implementation version."""
    impl_ver = sysconfig.get_config_var("py_version_nodot")
    if not impl_ver:
        impl_ver = ''.join(map(str, sys.version_info[:2]))
    return impl_ver
def get_impl_ver():
    """Return implementation version."""
    impl_ver = sysconfig.get_config_var("py_version_nodot")
    if not impl_ver:
        impl_ver = ''.join(map(str, sys.version_info[:2]))
    return impl_ver
Return implementation version.