List all the modules that are part of a python package?

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Is there a straightforward way to find all the modules that are part of a python package? I"ve found this old discussion, which is not really conclusive, but I"d love to have a definite answer before I roll out my own solution based on os.listdir().

Answer rating: 152

Yes, you want something based on pkgutil or similar -- this way you can treat all packages alike regardless if they are in eggs or zips or so (where os.listdir won"t help).

import pkgutil

# this is the package we are inspecting -- for example "email" from stdlib
import email

package = email
for importer, modname, ispkg in pkgutil.iter_modules(package.__path__):
    print "Found submodule %s (is a package: %s)" % (modname, ispkg)

How to import them too? You can just use __import__ as normal:

import pkgutil

# this is the package we are inspecting -- for example "email" from stdlib
import email

package = email
prefix = package.__name__ + "."
for importer, modname, ispkg in pkgutil.iter_modules(package.__path__, prefix):
    print "Found submodule %s (is a package: %s)" % (modname, ispkg)
    module = __import__(modname, fromlist="dummy")
    print "Imported", module




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