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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Reading progress of Git operation using GitPython stuck (or not printing)","articleBody":"I'm trying to access the progress of time consuming Git operations using GitPython. I tried the sample solution taken from the official documentation, and also tried passing in a method following the exact signature of the update method below. Everytime I call `fetch()`, `push()`, `pull()` **with** the parameter `progress=\u003canything\u003e`, the programm is stuck and the `update` method does not get called. If I call those operations without setting the `progress` parameter, it works flawlessly.\r\n\r\n- `$ git --version` is 2.21.0\r\n- Calling `sys.stdout.flush()` after `print()` does not help either\r\n- I use `assert` to assure my repo objects are available and in the expected state\r\n- `ProgressPrinter()` yields not `None`\r\n- I tried calling the functions from the main thread and multithreaded\r\n- I took a look at the [implementation (line 350)][1] of `RemoteProgress` and also the [implementation (line 815)][2] of `push()` and do not see a reason, why it would not continue execution\r\n- I found out, that when I assign my `ProgressPrinter` instance and pass the assigned variable, the programm is not stuck anymore. Yet the `update()` method does not get called and no progress is printed:\r\n\r\n```python\r\n# Not stuck anymore, yet no progress\r\npp = ProgressPrinter()\r\nfetch_info = origin.fetch(progress=pp)\r\n```\r\n___\r\nCore of my implementation:\r\n\r\n```python\r\nfrom git import RemoteProgress\r\n\r\nclass ProgressPrinter(RemoteProgress):\r\n    def update(self,\r\n               op_code,\r\n               cur_count,\r\n               max_count=None,\r\n               message=''):\r\n        print(\"Is this even called?\")\r\n```\r\nAnd later on:\r\n```python\r\norigin = repo.remotes.origin\r\nassert origin.exists()\r\nfetch_info = origin.fetch(progress=ProgressPrinter())\r\n\r\n```\r\n\r\nAny recommendations on how to investigate this problem furthermore? I've been debugging this for several days now and feel like I am missing something. \r\n\r\n  [1]: https://github.com/gitpython-developers/GitPython/blob/52ee33ac9b234c7501d97b4c2bf2e2035c5ec1fa/git/util.py#L350\r\n  [2]: https://github.com/gitpython-developers/GitPython/blob/52ee33ac9b234c7501d97b4c2bf2e2035c5ec1fa/git/remote.py#L815","author":{"url":"https://github.com/t89","@type":"Person","name":"t89"},"datePublished":"2019-05-06T12:50:51.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/871/GitPython/issues/871"}