Failing tests due to change in matplotlib behaviour in 3.1.0

[simonjayhawkins]

The allowed failures on Travis is currently failing on TestDataFramePlots.test_subplots

the matplotlib version used has changed today from 3.0.3 to 3.1.0

Code Sample, a copy-pastable example if possible

import matplotlib
print(matplotlib.__version__)
import numpy as np
import string
from pandas import DataFrame
df = DataFrame(np.random.rand(10, 3),
               index=list(string.ascii_letters[:10]))

axes = df.plot(kind='bar', subplots=True, sharex=True, legend=True)
for ax in axes[:-2]:
    collections = ax.get_xticklabels(minor=True)
    print(collections)
    for patch in collections:
        print(patch.get_visible())

Problem description

3.1.0
<a list of 2 Text xticklabel objects>
True
True

Expected Output

3.0.3
<a list of 7 Text xticklabel objects>
False
False
False
False
False
False
False

Output of pd.show_versions()

[paste the output of pd.show_versions() here below this line]

[simonjayhawkins]

AFAICT

the test calls

    def _check_visible(self, collections, visible=True):
        """
        Check each artist is visible or not

from

            for ax in axes[:-2]:
                self._check_visible(ax.xaxis)  # xaxis must be visible for grid
                self._check_visible(ax.get_xticklabels(), visible=False)
                self._check_visible(
                    ax.get_xticklabels(minor=True), visible=False)

ax.axis has a get_visible() method inherited from artist

get_xticklabels returns a list of text objects that have no documented get_visible() method.

[simonjayhawkins]

duplicate #26714