[MNT] [TYPING]: Use of Literal #30257
Description
Summary
While checking pyplot and corresponding matplotlib methods, I noticed that there are several functions where we could use typing.Literal to explicitly indicate the possible values and have them suggested by IDEs.
We also can create the corresponding TypeAlias on matplotlib.typing when necessary.
Proposed fix
| Function | Parameter | Literal replacing str | PR |
|---|---|---|---|
| mpl.set_loglevel | level | "notset", "debug", "info", "warning", "error", "critical" |
#30302 |
| plt.connect | s | "button_press_event", "button_release_event", ... |
#30275 |
| plt.Axes.scatter | marker | See MarkerType behind | #30261 |
| mpl.rc | group | "animation", "axes", axes3d, "axes3d", "boxplot", ... |
#30316 |
| mpl.RcParams.get_item / set_item | key | -- | #30316 |
| Type | Literal replacing str | PR |
|---|---|---|
| MarkerType | ".", ",", "o" | #30261 |
On MarkerType we can also add litterals for the tuple version that is not indicated for now:
tuple[int, Literal[1, 2, 3], int]