Question

I need to construct a list of modules that are provided by a list of Python distributions specified in a requirements.txt file. The distributions will first be installed so they should be available for inspection locally.

It looks like I should be able to use pip.req.parse_requirements to get the list of distributions from the requirements file. From there, how can I find the name of the module(s) that the distributions provide?

Answer 1

You can probably use the built in pkgutil module if your python versions are 2.3+

For example,

import sys, pkgutil
mods = set()

#You may not need this part if you don't care about the builtin modules
print sys.builtin_module_names
for m in sys.builtin_module_names:
    if m != '__main__':
        mods.add(m)
        #mods.add(m)


for loader, name, ispkg in pkgutil.walk_packages():
    if name.find('.') == -1:
        mods.add(name)

print mods