Closed
Description
Bug summary
Today only ArrayLike is used but it can also be a list or a tuple of 2-element tuples containing (value, color-like), as stated in the docs "If only colors are given, they are equidistantly mapped from the range [0, 1]; i.e. 0 maps to colors[0] and 1 maps to colors[-1]. If (value, color) pairs are given, the mapping is from value to color. This can be used to divide the range unevenly."
Code for reproduction
Create a test.py
from matplotlib.colors import LinearSegmentedColormap
colors = [(0.0, (0.0, 0.0, 0.0, 0.0)), (1.0, (1.0, 1.0, 1.0, 1.0))]
LinearSegmentedColormap.from_list(name="mycmap", colors=colors)
LinearSegmentedColormap.from_list(name="mycmap", colors=tuple(colors))test with mypy: mypy test.py
Actual outcome
test.py:4: error: Argument "colors" to "from_list" of "LinearSegmentedColormap" has incompatible type "list[tuple[float, tuple[float, float, float, float]]]"; expected "_SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | bool | int | float | complex | str | bytes | _NestedSequence[bool | int | float | complex | str | bytes]" [arg-type]
test.py:6: error: Argument "colors" to "from_list" of "LinearSegmentedColormap" has incompatible type "tuple[tuple[float, tuple[float, float, float, float]], ...]"; expected "_SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | bool | int | float | complex | str | bytes | _NestedSequence[bool | int | float | complex | str | bytes]" [arg-type]
Found 2 errors in 1 files (checked 1 source file)
Expected outcome
Expected no errors since this is possible and documented.
Success: no issues found in 1 source file
Additional information
No response
Operating system
No response
Matplotlib Version
3.8.3
Matplotlib Backend
No response
Python version
No response
Jupyter version
No response
Installation
None