René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"pytype is failing for standard `pkgutil.extend_path` usage","articleBody":"From [this Kokoro failure](https://source.cloud.google.com/results/invocations/c887f16f-87c2-4dcc-acb3-a067d0c4685c/targets/cloud-devrel%2Fclient-libraries%2Fpython%2Fgoogleapis%2Fpython-api-core%2Fpresubmit%2Fpresubmit/log) (there are lots):\r\n\r\n```\\\r\nnox \u003e Running session pytype\r\nnox \u003e Creating virtual environment (virtualenv) using python3.6 in .nox/pytype\r\nnox \u003e python -m pip install . grpcio \u003e= 1.8.2 grpcio-gcp \u003e= 0.2.2 pytype \u003e= 2019.3.21\r\nnox \u003e pytype\r\nComputing dependencies\r\nAnalyzing 37 sources with 0 local dependencies\r\nninja: Entering directory `.pytype'\r\n[1/37] check google.api_core.gapic_v1.routing_header\r\n[2/37] check google.api_core.datetime_helpers\r\n[3/37] check google.api_core.exceptions\r\n[4/37] check google.api_core.general_helpers\r\n[5/37] check google.api_core.timeout\r\n[6/37] check google.api_core.retry\r\n[7/37] check google.api_core.retry_async\r\n[8/37] check google.api_core.version\r\n[9/37] check google.api_core.gapic_v1.config\r\n[10/37] check google.api_core.gapic_v1.config_async\r\n[11/37] check google.api_core.grpc_helpers\r\n[12/37] check google.api_core.grpc_helpers_async\r\n[13/37] check google.api_core.client_info\r\n[14/37] check google.api_core.gapic_v1.client_info\r\n[15/37] check google.api_core.gapic_v1.method\r\n[16/37] check google.api_core.gapic_v1.method_async\r\n[17/37] check google.api_core.gapic_v1.__init__\r\n[18/37] check google.api_core.protobuf_helpers\r\n[19/37] check google.api_core.operations_v1.operations_client_config\r\n[20/37] check google.api_core.page_iterator\r\n[21/37] check google.api_core.operations_v1.operations_client\r\n[22/37] check google.api_core.page_iterator_async\r\n[23/37] check google.api_core.operations_v1.operations_async_client\r\n[24/37] check google.api_core.operations_v1.__init__\r\n[25/37] check google.api_core.future.base\r\n[26/37] check google.api_core.future.async_future\r\n[27/37] check google.api_core.operation_async\r\n[28/37] check google.api_core.future._helpers\r\n[29/37] check google.api_core.iam\r\n[30/37] check google.api_core.future.polling\r\n[31/37] check google.api_core.operation\r\n[32/37] check google.__init__\r\nFAILED: /tmpfs/src/github/python-api-core/.pytype/pyi/google/__init__.pyi\r\n/tmpfs/src/github/python-api-core/.nox/pytype/bin/python -m pytype.single --disable pyi-error --imports_info /tmpfs/src/github/python-api-core/.pytype/imports/google.__init__.imports --module-name google.__init__ -V 3.6 -o /tmpfs/src/github/python-api-core/.pytype/pyi/google/__init__.pyi --analyze-annotated --nofail --quick /tmpfs/src/github/python-api-core/google/__init__.py\r\nFile \"/tmpfs/src/github/python-api-core/google/__init__.py\", line 24, in \u003cmodule\u003e: Function pkgutil.extend_path was called with the wrong arguments [wrong-arg-types]\r\n         Expected: (path: List[str], ...)\r\n  Actually passed: (path: Iterable[str], ...)\r\n\r\nFor more details, see https://google.github.io/pytype/errors.html#wrong-arg-types\r\nninja: build stopped: subcommand failed.\r\nLeaving directory '.pytype'\r\nnox \u003e Command pytype  failed with exit code 1\r\nnox \u003e Session pytype failed.\r\n```\r\n\r\nI suspect we should upgrade to a newer version of `pytype` -- the [current release](https://github.com/google/pytype/releases/tag/2021.05.11) is more than two years newer than the one we are using, and e.g. supports Python 3.9.","author":{"url":"https://github.com/tseaver","@type":"Person","name":"tseaver"},"datePublished":"2021-05-13T16:53:38.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/186/python-api-core/issues/186"}