Bug summary

Type checkers complain when one uses a function that returnsNone as the parameter ofFuncAnimation. However, whenblit=False, the return value of the function is ignored.

Code for reproduction

importmatplotlib.pyplotaspltfrommatplotlibimportrcfrommatplotlib.animationimportFuncAnimationrc("animation",html="jshtml")fig,ax=plt.subplots()defupdate(frame:int)->None:ax.plot([0,1], [frame,frame])FuncAnimation(fig,update,range(10))

Actual outcome

MyPy saysArgument 2 to "FuncAnimation" has incompatible type "Callable[[int], None]"; expected "Callable[..., Iterable[Artist]]", but the code executes without problems.

Expected outcome

No MyPy error.

Additional information

I think is possible to allow functions that return arbitraryobject by combiningoverload andLiteral[True] /Literal[False] for theblit argument.

Operating system

Any

Matplotlib Version

3.10.0

Matplotlib Backend

No response

Python version

No response

Jupyter version

No response

Installation

pip