get_resource_reader: IndentationError: unexpected indent

[nschloe]

MWE:

• Set up venv:

  uv venv
  

  Using CPython 3.13.1 interpreter at: /usr/bin/python
  Creating virtual environment at: .venv
  Activate with: source .venv/bin/activate
  

• Activate:

  source .venv/bin/activate
  

• Install pytest:

  uv pip install pytest
  

  Resolved 4 packages in 4ms
  Installed 4 packages in 7ms
   + iniconfig==2.0.0
   + packaging==24.2
   + pluggy==1.5.0
   + pytest==8.3.4
  

• Run it:

  pytest
  

  Traceback (most recent call last):
    File ".venv/bin/pytest", line 5, in <module>
      from pytest import console_main
    File ".venv/lib/python3.13/site-packages/pytest/__init__.py", line 9, in <module>
      from _pytest.assertion import register_assert_rewrite
    File ".venv/lib/python3.13/site-packages/_pytest/assertion/__init__.py", line 11, in <module>
      from _pytest.assertion import rewrite
    File ".venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 294
      def get_resource_reader(self, name: str) -> TraversableResources:
  IndentationError: unexpected indent
  

The file in question:

# ...
    def get_data(self, pathname: str | bytes) -> bytes:
        """Optional PEP302 get_data API."""
        with open(pathname, "rb") as f:
            return f.read()

    from importlib.resources.abc import TraversableResources

        def get_resource_reader(self, name: str) -> TraversableResources:
            from importlib.resources.readers import FileReader

            return FileReader(types.SimpleNamespace(path=self._rewritten_names[name]))

# ...

[RonnyPfannschmidt]

https://github.com/pytest-dev/pytest/blob/517b0066b903e9688beab3377a3bd2439175797f/src/_pytest/assertion/rewrite.py#L276C47-L306C1

it seems your installation is corrupted and something removed conditionals

[The-Compiler]

This is wild. I can't reproduce using your steps above, and I agree that something is rewriting pytest's source code here.

Most likely not a pytest issue. Can you show a full terminal session where you do the steps above?

[nschloe]

Can you show a full terminal session where you do the steps above?

@The-Compiler What exactly do you mean by that? Here's a full output:

❯ cd ~/tmp/
❯ mkdir x
❯ cd x
❯ uv venv
Using CPython 3.13.1 interpreter at: /usr/bin/python
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
❯ source .venv/bin/activate
❯ uv pip install pytest

Resolved 4 packages in 127ms
Installed 4 packages in 11ms
 + iniconfig==2.0.0
 + packaging==24.2
 + pluggy==1.5.0
 + pytest==8.3.4
❯ pytest
Traceback (most recent call last):
  File "/home/nschloe/tmp/x/.venv/bin/pytest", line 5, in <module>
    from pytest import console_main
  File "/home/nschloe/tmp/x/.venv/lib/python3.13/site-packages/pytest/__init__.py", line 9, in <module>
    from _pytest.assertion import register_assert_rewrite
  File "/home/nschloe/tmp/x/.venv/lib/python3.13/site-packages/_pytest/assertion/__init__.py", line 11, in <module>
    from _pytest.assertion import rewrite
  File "/home/nschloe/tmp/x/.venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 294
    def get_resource_reader(self, name: str) -> TraversableResources:
IndentationError: unexpected indent
~/tmp/x ❯  

[The-Compiler]

Yep, that. Basically I'm looking at any clues to see what could be happening, and a full 1:1 terminal session can help with that. However, I'm still at a loss. Evidently something is tampering with pytest's source code on your system somehow.

Could you rerun with -v added to both uv steps and share the debug logs? Also, can you reproduce if you use python3 -m venv .venv and pip, i.e. cutting uv out of the picture?

[The-Compiler]

Oh, and could you also please upload your entire:

• .venv/lib/python3.13/site-packages/_pytest/
• .venv/lib/python3.13/site-packages/pytest/
• .venv/lib/python3.13/site-packages/pytest-8.3.4.dist-info/

somewhere? Maybe there is more clues in there on what's going on, when looking at the difference to what's actually uploaded to PyPI by pytest.