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Description
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Bug report
Bug summary
Creating a simple 2d histogram fails when the bins are not equally spaced under some circumstances.
Code for reproduction
- A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required
On a Jupyter notebook
%matplotlib inline
import matplotlib.pyplot as plt
x = plt.hist2d([1,2,3], [3,5,6], bins=[[0,3,7], [1,2,3]])Actual outcome
- The output produced by the above code, which may be a screenshot, console output, etc.
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/zah/anaconda3/lib/python3.6/site-packages/IPython/core/formatters.py in __call__(self, obj)
305 pass
306 else:
--> 307 return printer(obj)
308 # Finally look for special method names
309 method = get_real_method(obj, self.print_method)
/home/zah/anaconda3/lib/python3.6/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
238
239 if 'png' in formats:
--> 240 png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
241 if 'retina' in formats or 'png2x' in formats:
242 png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
/home/zah/anaconda3/lib/python3.6/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
122
123 bytes_io = BytesIO()
--> 124 fig.canvas.print_figure(bytes_io, **kw)
125 data = bytes_io.getvalue()
126 if fmt == 'svg':
/home/zah/anaconda3/lib/python3.6/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
2200 bbox_filtered = []
2201 for a in bbox_artists:
-> 2202 bbox = a.get_window_extent(renderer)
2203 if a.get_clip_on():
2204 clip_box = a.get_clip_box()
/home/zah/anaconda3/lib/python3.6/site-packages/matplotlib/image.py in get_window_extent(self, renderer)
704
705 def get_window_extent(self, renderer=None):
--> 706 x0, x1, y0, y1 = self._extent
707 bbox = Bbox.from_extents([x0, y0, x1, y1])
708 return bbox.transformed(self.axes.transData)
TypeError: 'NoneType' object is not iterable
<matplotlib.figure.Figure at 0x7f828c153240>
This works if I remove the %matplotlib inline above, even if I try to write a png image with e.g. plt.savefig('/tmp/xx.png'). However the bug was found in a code that doesn't use IPython (though I don't know how to reproduce it).
It does work if I change the histogram to:
x = plt.hist2d([1,2,3], [3,5,6], bins=[[0,3,6], [1,2,3]])making all the bins equally spaced.
Expected outcome
- No crash.
I'm using the conda forge package of mpl 2.0.