Python matplotlib.pyplot pie charts: How to remove

问题:

I plot a piechart using pyplot.

import pylab
import pandas as pd
test = pd.Series(['male', 'male', 'male', 'male', 'female'], name="Sex")
test = test.astype("category")
groups = test.groupby([test]).agg(len)
groups.plot(kind='pie', shadow=True)
pylab.show()

The result:

However, I'm unable to remove the label on the left (marked red in the picture). I already tried

plt.axes().set_xlabel('')

and

plt.axes().set_ylabel('')

but that did not work.

回答1:

You could just set the ylabel by calling pylab.ylabel:

pylab.ylabel('')

or

pylab.axes().set_ylabel('')

In your example, plt.axes().set_ylabel('') will not work because you dont have import matplotlib.pyplot as plt in your code, so plt doesn't exist.

Alternatively, the groups.plot command returns the Axes instance, so you could use that to set the ylabel:

ax=groups.plot(kind='pie', shadow=True)
ax.set_ylabel('')