install futures only form py2.7
@@ -63,7 +63,8 @@ setup(
#
# For an analysis of "install_requires" vs pip's requirements files see:
# https://packaging.python.org/en/latest/requirements.html
- install_requires=['futures',
+ install_requires=[
+ 'futures >= 3.0.0; python_version == "2.7"',
'ptyprocess',
'pyyaml',
'six',
