def package_tree(pkgroot):
    subdirs = [os.path.relpath(i[0], THIS_DIR).replace(os.path.sep, '.')
               for i in os.walk(os.path.join(THIS_DIR, pkgroot))
               if i[2] in '__init__.py']
    return subdirs
dataset/ETHPy150Open zoofIO/flexx/setup.py/package_tree/swapped operands of `in`