repo.submodule_update(init=True)---------------------------------------------------------------------------OSError                                   Traceback (most recent call last)<ipython-input-6-86ea9b78455b> in <module>()----> 1 repo.submodule_update(init=True)/usr/lib/python2.7/dist-packages/git/repo/base.pyc in submodule_update(self, *args, **kwargs)    265                 take the previous state into consideration. For more information, please    266         see the documentation of RootModule.update"""--> 267                 return RootModule(self).update(*args, **kwargs)    268     269         #}END submodules/usr/lib/python2.7/dist-packages/git/objects/submodule/root.pyc in update(self, previous_commit, recursive, force_remove, init, to_latest_revision, progress, dry_run)    293                         # update the submodule using the default method    294             sm.update(recursive=False, init=init, to_latest_revision=to_latest_revision, --> 295                         progress=progress, dry_run=dry_run)    296     297                         # update recursively depth first - question is which inconsitent/usr/lib/python2.7/dist-packages/git/objects/submodule/base.pyc in update(self, recursive, init, to_latest_revision, progress, dry_run)    376                                         os.rmdir(module_path)    377                                 except OSError:--> 378                                         raise OSError("Module directory at %r does already exist and is non-empty" % module_path)    379                                 # END handle OSError    380                         # END handle directory removalOSError: Module directory at '/home/me/gitpython-test/somesubmodule' does already exist and is non-empty