如何以png格式保存Plotly Offline图? [英] How to save Plotly Offline graph in format png?

问题描述

我正在使用Plotly offline来在python中生成图形.

I am using Plotly offline to generate graph in python.

根据下面的文档

https://plot.ly/python/offline/

这是我的代码，可以完美地生成C:/tmp/test_plot.html文件.

Here is my code, which perfectly generates C:/tmp/test_plot.html file.

import plotly.offline as offline

offline.init_notebook_mode()

offline.plot({'data': [{'y': [4, 2, 3, 4]}], 
               'layout': {'title': 'Test Plot', 
                          'font': dict(family='Comic Sans MS', size=16)}},
             auto_open=False, filename='C:/tmp/test_plot')

如何将此图形另存为png而不是html?

How can I save this graph as png instead of html?

推荐答案

offline.plot方法具有image='png和image_filename='image_file_name'属性，用于将文件另存为png.

offline.plot method has image='png and image_filename='image_file_name' attributes to save the file as a png.

offline.plot({'data': [{'y': [4, 2, 3, 4]}], 
              'layout': {'title': 'Test Plot', 
                         'font': dict(family='Comic Sans MS', size=16)}},
             auto_open=True, image = 'png', image_filename='plot_image',
             output_type='file', image_width=800, image_height=600, 
             filename='temp-plot.html', validate=False)

在offline.py内部或在plotly在线查看更多详细信息.

See more details inside offline.py or online at plotly.

但是，有一点需要注意的是，由于输出图像是与HTML绑定的，因此它将在浏览器中打开并要求获得保存图像文件的权限.您可以在浏览器设置中将其关闭.

However, one caveat is that , since the output image is tied to HTML, it will open in browser and ask for permissions to save the image file. You can turn that off in your browser settings.

或者， 您可能想使用plot_mpl从

进行从图到Matplotlib的转换. 以下示例来自offline.py

Alternately, You may want to look at plotly to matplotlib conversion using plot_mpl.
Following example is from offline.py

from plotly.offline import init_notebook_mode, plot_mpl
    import matplotlib.pyplot as plt

    init_notebook_mode()

    fig = plt.figure()
    x = [10, 15, 20, 25, 30]
    y = [100, 250, 200, 150, 300]
    plt.plot(x, y, "o")

    plot_mpl(fig)
    # If you want to to download an image of the figure as well
    plot_mpl(fig, image='png')

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