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Pandas Series not supported as data kwarg #12971
Description
Bug report
Bug summary
Passing a pandas Series object to axes.plot as data doesn't work.
This used to work in matplotlib 2.
Code for reproduction
from matplotlib import figure
from matplotlib.backends.backend_agg import FigureCanvasAgg
import pandas as pd
if __name__ == '__main__':
fig = figure.Figure()
ax = fig.add_subplot(1, 1, 1)
data = pd.Series(data=[0, 1], index=['xdata', 'ydata'])
print(data['xdata'])
print(data['ydata'])
ax.plot('xdata', 'ydata', data=data, marker='o')
canvas = FigureCanvasAgg(fig)
canvas.print_figure('test.png')Actual outcome
0
1
Traceback (most recent call last):
File "test1.py", line 12, in <module>
ax.plot('xdata', 'ydata', data=data, marker='o')
File "/home/stilley2/anaconda3/envs/testmpl/lib/python3.7/site-packages/matplotlib/__init__.py", line 1805, in inner
return func(ax, *args, **kwargs)
File "/home/stilley2/anaconda3/envs/testmpl/lib/python3.7/site-packages/matplotlib/axes/_axes.py", line 1603, in plot
for line in self._get_lines(*args, **kwargs):
File "/home/stilley2/anaconda3/envs/testmpl/lib/python3.7/site-packages/matplotlib/axes/_base.py", line 393, in _grab_next_args
yield from self._plot_args(this, kwargs)
File "/home/stilley2/anaconda3/envs/testmpl/lib/python3.7/site-packages/matplotlib/axes/_base.py", line 342, in _plot_args
linestyle, marker, color = _process_plot_format(tup[-1])
File "/home/stilley2/anaconda3/envs/testmpl/lib/python3.7/site-packages/matplotlib/axes/_base.py", line 118, in _process_plot_format
'Unrecognized character %c in format string' % c)
ValueError: Unrecognized character a in format string
Expected outcome
A plot with a point at (0, 1)
Matplotlib version
(installed using conda)
- Operating system: Centos7
- Matplotlib version: 3.0.1
- Matplotlib backend: agg (but probably doesn't matter)
- Python version: 3.7
- Pandas version: 0.23.4
Activity
ImportanceOfBeingErnest commentedon Dec 10, 2018
Bisects to #10872
anntzer commentedon Dec 10, 2018
Fixed by #10928, which is opened since 8 months ago.
stilley2 commentedon Dec 10, 2018
Ah I missed that issue while searching. Should I close this one then?
anntzer commentedon Dec 10, 2018
Well, that PR is not merged yet (I'm just gently nudging other devs to merge it...), so this can stay open until one of the fixing PRs goes in.
timhoffm commentedon Dec 28, 2018
Will be fixed for 3.1 via #10928