Python matplotlib.pyplot pie charts: How to remove the label on the left side?

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('')