For PyPI it is rather straightforward to get downloads information: http://stackoverflow.com/questions/21419009/json-api-for-pypi-how-to-list-packages http://st

For PyPI it is rather straightforward to get downloads information: http://stackoverflow.com/questions/21419009/json-api-for-pypi-how-to-list-packages http://stackoverflow.com/questions/21419009/json-api-for-pyp... (along with some other data, e.g. categorization). See example: https://pypi.python.org/pypi/seaborn/json https://pypi.python.org/pypi/seaborn/json