-r requirements.txt
flake8==3.0.4
mccabe==0.6.1
py==1.5.2
pycodestyle==2.0.0
pyflakes==1.6.0
pytest==3.2.5
pytest-cov==2.5.1

-r requirements.txt
flake8==3.0.4
mccabe==0.6.1
py==1.5.2
pycodestyle==2.3.1
pyflakes==1.6.0
pytest==3.2.5
pytest-cov==2.5.1

Update pycodestyle from 2.0.0 to 2.3.1
Update pycodestyle from 2.0.0 to 2.3.1