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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"bug: Class init parameter name disappears from attribute docstring using `separate_signature`","articleBody":"### Description of the bug\r\nWhen calling a method on an input argument to a class `__init__` while having `separate_signature: true`, the parameter name disappears from the rendered instance attribute docstring, leaving only the attribute name and the method called on the input argument.\r\n\r\n### To Reproduce\r\n\u003cdetails\u003e\r\n\r\n```console\r\npython -m venv .venv\r\n. .venv/bin/activate\r\npip install mkdocstrings-python\r\npython\r\n```\r\n\r\n```yaml\r\n# mkdocs.yml\r\nsite_name: test-site\r\nplugins:\r\n  - mkdocstrings:\r\n      default_handler: python\r\n      handlers:\r\n        python:\r\n          options:\r\n            separate_signature: true\r\n```\r\n\r\n```markdown\r\n\u003c!-- test.md --\u003e\r\n::: test\r\n```\r\n\r\n```python\r\n# test.py\r\n\r\nclass SomeClass:\r\n    \"\"\"This is a class that does something.\"\"\"\r\n\r\n    def __init__(self, some_float: float) -\u003e None:\r\n        self.as_hex = some_float.hex()\r\n        \"\"\"The hex value of the input float.\"\"\"\r\n```\r\n\u003c/details\u003e\r\n\r\n### Expected behavior\r\n![image](https://github.com/user-attachments/assets/06098a37-ff7f-4c42-a457-50ecbf3efd9d)\r\n\r\nI expect the rendered docstring for the `as_hex` instance attribute to say `as_hex = some_float.hex()`.\r\n\r\n### Actual behavior\r\n![image](https://github.com/user-attachments/assets/891226c5-380c-4bce-a933-fa299e8aeda5)\r\n\r\nWith `separate_signature: true`, the `some_float` part disappears, and what is rendered is only `as_hex = hex()`.\r\n\r\n\r\n### Environment information\r\n```bash\r\npython -m mkdocstrings_handlers.python.debug  # | xclip -selection clipboard\r\n```\r\n\r\n- __System__: Linux-6.8.0-49-generic-x86_64-with-glibc2.39\r\n- __Python__: cpython 3.13.1 (/home/stefan/test-mkdocstrings/.venv/bin/python)\r\n- __Environment variables__:\r\n- __Installed packages__:\r\n  - `mkdocs` v1.6.1\r\n  - `mkdocstrings` v0.27.0\r\n  - `mkdocstrings-python` v1.12.2\r\n  - `griffe` v1.5.1","author":{"url":"https://github.com/connesy","@type":"Person","name":"connesy"},"datePublished":"2024-12-11T13:45:41.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/215/python/issues/215"}