-r requirements.txt
flake8==3.0.4
mccabe==0.6.1
py==1.4.34
pycodestyle==2.0.0
pyflakes==1.3.0
pytest==3.0.3
pytest-cov==2.5.1

-r requirements.txt
flake8==3.0.4
mccabe==0.6.1
py==1.5.2
pycodestyle==2.0.0
pyflakes==1.3.0
pytest==3.0.3
pytest-cov==2.5.1

Update py from 1.4.34 to 1.5.2
Update py from 1.4.34 to 1.5.2