Matplotlib：设置标签字体而不设置标签

Question

I would like to write a function that changes the font of all of the labels in a figure that I pass to it without actually changing the labels themselves.

This is useful for figures that I have already created and need to have a uniform font style.

Currently I am using multiple font dictionaries like so:

titleFont = {'family' : 'Arial',
             'weight' : 'bold',
             'size'   : 20}
axesFont = {'family' : 'Arial',
             'weight' : 'bold',
             'size'   : 18}
axesTickFont = {'family' : 'Arial',
                'weight' : 'bold',
                'size'   : 16}`

And then setting the font sizes by using commands along the lines of:

ax.set_title('My Plot',**titleFont)

The issue is that with the command above, I need to specify a plot title, when all I want to do is set the font style of an existing title.

Something like this would be ideal:

def set_fonts(axis):
    axis.set_title(**titleFont)
    axis.set_ylabel(**axesFont)
    axis.set_xlabel(**axesFont)
    return axis

Answer 1

This is probably not the cleanest solution, but it should do what you want:

def set_fonts(axis):
    axis.set_title(axis.get_title(), **titleFont)
    axis.set_ylabel(axis.get_ylabel(), **axesFont)
    axis.set_xlabel(axis.get_xlabel(), **axesFont)
    return axis

Otherwise you can directly access the relevant artist instances, which avoids reassigning the text:

def set_fonts(axis):
    plt.setp(axis.title, **titleFont)
    plt.setp(axis.xaxis.label, **axesFont)
    plt.setp(axis.yaxis.label, **axesFont)
    return axis