Find where dependencies are coming from in Python?

When I run pip install . I get all dependencies installed, including transitive dependencies, but the problem is that there are开发者_StackOverflow中文版 two modules that depend on two different versions of lxml. How can I figure out who is requiring what with pip or any other tool?

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Do you have an idea of which modules depend on lxml? If so, you could simply check those modules setup.py files and check install_requires, and most package creators will include the version number as well. e.g.

  install_requires=[
    'django-modeldict>=1.1.6',
    'nexus>=0.1.7',
    'django-jsonfield',
  ],

From: https://github.com/disqus/gargoyle/blob/master/setup.py

You may also want to look into something like modulefinder but I think simply checking the setup.py is much easier in this case.