Movatterモバイル変換


[0]ホーム

URL:


Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

Sign up
Appearance settings

[Bug]: matplotlib.colors.LinearSegmentedColormap.from_list doesn't work with hex representation of colors #27029

Closed as not planned
@jose-vines-toteat

Description

@jose-vines-toteat

Bug summary

For some reason colors.LinearSegmentedColormap.from_list stopped working with colors such as '#E3DBCC', when in previous versions it used to work.

It raises an error into_rgba_array(colors), but when actually callingcolors.to_rgba_array(['#E3DBCC']) it works just fine.

Code for reproduction

importmatplotlib.colorsascolorsstart='#E3DBCC'end='#FF4B33'color_list= [(0,start), (1,end)]my_cmap=colors.LinearSegmentedColormap.from_list('my_cmap',color_list)

Actual outcome

---------------------------------------------------------------------------ValueError                                Traceback (most recent call last)Cell In[12], line 6      3 end = '#FF4B33'      5 color_list = [(0, start), (1, end)]----> 6 my_cmap = colors.LinearSegmentedColormap.from_list('my_cmap', color_list)File ~/mambaforge/envs/tf/lib/python3.9/site-packages/matplotlib/colors.py:1065, in LinearSegmentedColormap.from_list(name, colors, N, gamma)   1062 else:   1063     vals = np.linspace(0, 1, len(colors))-> 1065 r, g, b, a = to_rgba_array(colors).T   1066 cdict = {   1067     "red": np.column_stack([vals, r, r]),   1068     "green": np.column_stack([vals, g, g]),   1069     "blue": np.column_stack([vals, b, b]),   1070     "alpha": np.column_stack([vals, a, a]),   1071 }   1073 return LinearSegmentedColormap(name, cdict, N, gamma)File ~/mambaforge/envs/tf/lib/python3.9/site-packages/matplotlib/colors.py:489, in to_rgba_array(c, alpha)    487         raise e    488 if isinstance(c, str):--> 489     raise ValueError(f"{c!r} is not a valid color value.")    491 if len(c) == 0:    492     return np.zeros((0, 4), float)ValueError: '#E3DBCC' is not a valid color value.

Expected outcome

I expect the LinearSegmentedColormap to be created successfully.

Additional information

No response

Operating system

OS X 13.1

Matplotlib Version

3.8.0

Matplotlib Backend

'module://matplotlib_inline.backend_inline'

Python version

3.9

Jupyter version

3.6.1

Installation

conda

Metadata

Metadata

Assignees

No one assigned

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions


      [8]ページ先頭

      ©2009-2025 Movatter.jp