Hacktoberfest 2026:维护者为十月标记出来的 issue,仍然开放、适合新手。 浏览 Hacktoberfest issue

Matplotlib figures are not redrawn in the cell in which they are created

未关闭
#258 2 条评论 1 个 reaction 已指派 0 人 在 GitHub 查看

还没有人认领这个 Issue。

评估

难度
4/5
预计耗时
3-5 天
新手友好度
35/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
jupyter-notebook, matplotlib, python

调研方向

首先,在 JupyterLab 或 Notebook 中使用 %matplotlib widget 后端运行提供的同一单元格复现,然后将其与分离单元格版本进行比较。完成标准是:fig.canvas.draw() 会在每次循环迭代期间明显更新图形,而不是仅在循环结束后更新。

由索引模型根据 Issue 内容生成。

描述

Describe the issue

Using an interactive figure's canvas.draw() method does not update the figure if it was created in the same cell as the draw call.

Figure created in the same cell:
Same cell

Figure created in another cell:
different cell

Reproduce

  1. Open a new notebook in JupyterLab or Notebook
  2. Insert the following code:
import matplotlib.pyplot as plt
import time

%matplotlib widget

fig = plt.figure()

for i in range(5):
    x = list(range(i+2))
    xx = [x**2 for x in x]
    plt.clf()
    plt.plot(x, xx)
    fig.canvas.draw()
    
    time.sleep(1)
  1. Run the cell and observe that the plot does not show until the loop has exited.

Optional:

  1. Move the for loop to a separate cell from the figure creation
  2. Run cell and observe plot updates during the loop

This can be reproduced using the scipy notebook docker stack.

Versions

3.8.5 | packaged by conda-forge | (default, Jul 31 2020, 02:39:48)
[GCC 7.5.0]
ipympl version: 0.5.7
jupyter core     : 4.6.3
jupyter-notebook : 6.0.3
qtconsole        : not installed
ipython          : 7.17.0
ipykernel        : 5.3.4
jupyter client   : 6.1.6
jupyter lab      : 2.1.5
nbconvert        : 5.6.1
ipywidgets       : 7.5.1
nbformat         : 5.0.7
traitlets        : 4.3.3
Known nbextensions:
  config dir: /opt/conda/etc/jupyter/nbconfig
    notebook section
      jupyter-matplotlib/extension  enabled
      - Validating: OK
      jupyter-js-widgets/extension  enabled
      - Validating: OK
JupyterLab v2.1.5
Known labextensions:
   app dir: /opt/conda/share/jupyter/lab
        @bokeh/jupyter_bokeh v2.0.3  enabled  OK
        @jupyter-widgets/jupyterlab-manager v2.0.0  enabled  OK
        jupyter-matplotlib v0.7.3  enabled  OK
主要语言
Jupyter Notebook
星标
1.7k
派生
234
PR 合并指标
30 天内没有已合并 PR

环境准备

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

matplotlib/ipympl 的其他 Issue

查看 matplotlib/ipympl 的全部 Issue

相似的 Issue

更多 Data Visualization Issue

把新 issue 发到你的邮箱

精选适合新手参与的 GitHub issue 摘要。