cfl() doesn't clear gcf()._suptitle

[brorfred]

Issue

suptitle doesn't replace the text if the figure is cleared with clf.

Work:

import pylab as plt
plt.figure()
plt.suptitle('KK')
plt.suptitle('HH')

Doesn't work:

import pylab as plt
plt.figure()
plt.suptitle('KK')
plt.clf()
plt.suptitle('KK')
plt.suptitle('HH')

Solution?

add self._suptitle = None to figure.clf()

Thanks!!!

/Bror Jonsson

[pelson]

Sounds reasonable. Do you fancy trying to submit a PR with the necessary change and a test to ensure that this remains fixed?

Thanks!

[tacaswell]

@brorfred Are you interested in putting together the fix + a test?

Should be linked to #1747

[cimarronm]

Likewise, even without the clf(), you have an issue if you call fig.suptitle() >2 times
The following code will show both "BB" and "CC" being rendered on the figure (in fact there are three text artists being rendered: two with "BB" and one with "CC")

import pylab as plt
plt.figure()
plt.suptitle('AA')
plt.suptitle('BB')
plt.suptitle('CC') 

The larger issue is that each time plt.suptitle is called it creates an endless amount of text artists as you can see with the following sample code

import pylab as plt
fig = plt.figure()
print(fig.texts)
plt.suptitle('AA')
plt.suptitle('BB')
plt.suptitle('CC')
plt.suptitle('DD')
print(fig.texts)

You will see that 4 text artists are added with fig._suptitle only point to one of them.

[pelson]

Closed by #2711