Fix issue with partialed functions.

Author: tobiasraabe

src/_pytask/mark/structures.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import functools
 import warnings
 from typing import Any
 from typing import Callable
@@ -13,7 +14,10 @@
 
 
 def is_task_function(func: Any) -> bool:
-    return callable(func) and getattr(func, "__name__", "<lambda>") != "<lambda>"
+    return (callable(func) and getattr(func, "__name__", "<lambda>") != "<lambda>") or (
+        isinstance(func, functools.partial)
+        and getattr(func.func, "__name__", "<lambda>") != "<lambda>"
+    )
 
 
 @define(frozen=True)

tests/test_task.py

@@ -347,7 +347,7 @@ def func(produces, content):
         produces.write_text(content)
 
     task_func = pytask.mark.produces("out.txt")(
-        pytask.mark.skip(functools.partial(func, content="hello"))
+        functools.partial(func, content="hello")
     )
     """
     tmp_path.joinpath("task_module.py").write_text(textwrap.dedent(source))
@@ -357,6 +357,7 @@ def func(produces, content):
     assert result.exit_code == ExitCode.OK
     assert "Collected 1 task." in result.output
     assert "1  Succeeded" in result.output
+    assert tmp_path.joinpath("out.txt").exists()
 
 
 @pytest.mark.end_to_end