-r requirements.txt
bottle
pytest
# pytest-cov 2.6.0 has increased the version requirement 
# for the coverage package from >=3.7.1 to >=4.4, 
# which is in conflict with the version requirement 
# defined by the python-coveralls package for coverage==4.0.3
pytest-cov>=2.4.0,<2.6
python-coveralls