在脚本中使用Matplotlib的渲染器问题 [英] Renderer problems using Matplotlib from within a script

问题描述

我已经把这个范围缩小了:

I've narrowed down to this call:

fig.canvas.tostring_argb() #fig=matplotlib.pyplot.figure()

当我将代码作为 python 脚本运行时，这个函数会引发一个 AttributeError. AttributeError:'FigureCanvasGTKAgg'对象没有属性'renderer'

this function raises an AttributeError when I run the code as a python script. AttributeError: 'FigureCanvasGTKAgg' object has no attribute 'renderer'

但是，如果在 ipython --pylab 命令行中运行，此代码可以正常工作.

However, this code works properly if run in the ipython --pylab command line.

据我所知，Agg 渲染器应该可以正常工作.

As far as I can tell from the documentation, the Agg renderer should work OK.

上下文是我试图用数字制作电影，而不保存帧到磁盘；按照此问题.我正在使用流像素阵列的方法到 ffmpeg (作为一个单独的进程运行)来执行此操作，我需要框架的值的 argb 数组.

The context is that I'm trying to make a movie from figures, without saving the frames to disk; as per this question. I'm using the approach that streams the pixel arrays to ffmpeg (running as a separate process) to do this, I need the argb array of values from the frame.

是否可以进行一些配置设置，以使matplotlib在脚本中正常工作?

Is there some configuration setting I can make to get matplotlib to work correctly from within a script?

编辑根据评论尝试 use('Agg');仍然失败；这是一个最小的工作示例.

Edit Tried use('Agg') as per a comment; still fails; this is a minimal working example.

[dave@dave tools]$ python -c "import matplotlib; matplotlib.use('Agg'); import matplotlib.pyplot; fig=matplotlib.pyplot.figure(); fig.canvas.tostring_argb()"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 416, in tostring_argb
    return self.renderer.tostring_argb()
AttributeError: FigureCanvasAgg instance has no attribute 'renderer'

推荐答案

我最终安装并使用了 WXAgg 后端；Agg 和默认的 GTKAgg 对我不起作用.

I ended up installing and using the WXAgg backend; the Agg,and default GTKAgg, didn't work for me.

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