python - 保存在 python 中使用 peek() 显示的图像

Question

  import matplotlib.pyplot as plt
  import sunpy.spectra
  import sunpy.data.sample
  from sunpy.spectra.sources.callisto import CallistoSpectrogram
  image = CallistoSpectrogram.read(sunpy.data.sample.CALLISTO_IMAGE)
  image.peek()

那么如何使用命令保存这张图片呢？

Answer 1

我没有 SunPy 环境来测试它，但你能试一试吗？

import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
import sunpy.spectra
import sunpy.data.sample
from sunpy.spectra.sources.callisto import CallistoSpectrogram
image = CallistoSpectrogram.read(sunpy.data.sample.CALLISTO_IMAGE)
image.plot()
plt.savefig('myfig')

基于 Generate images without having a window appear :

The easiest way to do this is use a non-interactive backend (see What is a backend?) such as Agg (for PNGs), PDF, SVG or PS. In your figure-generating script, just call the matplotlib.use() directive before importing pylab or pyplot:

import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.savefig('myfig')