Python：查找包中的所有包

Question

给定一个包，我怎样才能自动找到它的所有子包？

Answer 1

You can't rely on introspection of loaded modules, because sub-packages may not have been loaded. You'll have to look at the filesystem, assuming the top level package in question is not an egg, zip file, extension module, or loaded from memory.

def get_subpackages(module):
    dir = os.path.dirname(module.__file__)
    def is_package(d):
        d = os.path.join(dir, d)
        return os.path.isdir(d) and glob.glob(os.path.join(d, '__init__.py*'))

    return filter(is_package, os.listdir(dir))

Answer 2

Inspired by James Emerton's answer:

def find_subpackages(module):
    result=[]
    for thing in os.listdir(os.path.dirname(module.__file__)):
        full=os.path.join(os.path.dirname(module.__file__),thing)
        if os.path.isdir(full):
            if glob.glob(os.path.join(full, '__init__.py*'))!=[]:
                result.append(thing)
    return result