Tracing all imports

debug_imports.py

import sys
import __builtin__
real_import = __builtin__.__import__

def debug_import(name, locals=None, globals=None, fromlist=None, level=-1):
    glob = globals or sys._getframe(1).f_globals
    importer_name = glob and glob.get('__name__') or 'unknown'
    print('{} imports {}'.format(importer_name, name))
    return real_import(name, locals, globals, fromlist, level)

__builtin__.__import__ = debug_import

From this talk - https://speakerdeck.com/mitsuhiko/didntknow