Bug summary

I am using the example for a log bar chart, but I stumbled upon that error for my own plot.

When setting an axis to log scale, I get a font not found error.
Without that line everything works.

I tried it in a jupyter notebook, and a simple .py file and in both cases I get the same error.

Code for reproduction

import matplotlib.pyplot as plt
import numpy as np

data = ((3, 1000), (10, 3), (100, 30), (500, 800), (50, 1))

dim = len(data[0])
w = 0.75
dimw = w / dim

fig, ax = plt.subplots()
x = np.arange(len(data))
for i in range(len(data[0])):
    y = [d[i] for d in data]
    b = ax.bar(x + i * dimw, y, dimw, bottom=0.001)

# ax.set_xticks(x + dimw / 2, labels=map(str, x))
ax.set_yscale('log')

ax.set_xlabel('x')
ax.set_ylabel('y')

plt.show()

Actual outcome

findfont: Font family ['DejaVu Sans'] not found. Falling back to DejaVu Sans.

ValueError Traceback (most recent call last)
~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/IPython/core/formatters.py in call(self, obj)
339 pass
340 else:
--> 341 return printer(obj)
342 # Finally look for special method names
343 method = get_real_method(obj, self.print_method)

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/IPython/core/pylabtools.py in (fig)
246
247 if 'png' in formats:
--> 248 png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
249 if 'retina' in formats or 'png2x' in formats:
250 png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
130 FigureCanvasBase(fig)
131
--> 132 fig.canvas.print_figure(bytes_io, **kw)
133 data = bytes_io.getvalue()
134 if fmt == 'svg':

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)
2191 else suppress())
2192 with ctx:
-> 2193 self.figure.draw(renderer)
2194
2195 bbox_inches = self.figure.get_tightbbox(

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
39 renderer.start_filter()
40
---> 41 return draw(artist, renderer, *args, **kwargs)
42 finally:
43 if artist.get_agg_filter() is not None:

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/figure.py in draw(self, renderer)
1861
1862 self.patch.draw(renderer)
-> 1863 mimage._draw_list_compositing_images(
1864 renderer, self, artists, self.suppressComposite)
1865

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
129 if not_composite or not has_images:
130 for a in artists:
--> 131 a.draw(renderer)
132 else:
133 # Composite any adjacent images together

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
39 renderer.start_filter()
40
---> 41 return draw(artist, renderer, *args, **kwargs)
42 finally:
43 if artist.get_agg_filter() is not None:

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/cbook/deprecation.py in wrapper(*inner_args, **inner_kwargs)
409 else deprecation_addendum,
410 **kwargs)
--> 411 return func(*inner_args, **inner_kwargs)
412
413 return wrapper

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
2745 renderer.stop_rasterizing()
2746
-> 2747 mimage._draw_list_compositing_images(renderer, self, artists)
2748
2749 renderer.close_group('axes')

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
129 if not_composite or not has_images:
130 for a in artists:
--> 131 a.draw(renderer)
132 else:
133 # Composite any adjacent images together

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
39 renderer.start_filter()
40
---> 41 return draw(artist, renderer, *args, **kwargs)
42 finally:
43 if artist.get_agg_filter() is not None:

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
1163
1164 ticks_to_draw = self._update_ticks()
-> 1165 ticklabelBoxes, ticklabelBoxes2 = self._get_tick_bboxes(ticks_to_draw,
1166 renderer)
1167

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/axis.py in _get_tick_bboxes(self, ticks, renderer)
1089 def _get_tick_bboxes(self, ticks, renderer):
1090 """Return lists of bboxes for ticks' label1's and label2's."""
-> 1091 return ([tick.label1.get_window_extent(renderer)
1092 for tick in ticks if tick.label1.get_visible()],
1093 [tick.label2.get_window_extent(renderer)

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/axis.py in (.0)
1089 def _get_tick_bboxes(self, ticks, renderer):
1090 """Return lists of bboxes for ticks' label1's and label2's."""
-> 1091 return ([tick.label1.get_window_extent(renderer)
1092 for tick in ticks if tick.label1.get_visible()],
1093 [tick.label2.get_window_extent(renderer)

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/text.py in get_window_extent(self, renderer, dpi)
900
901 with cbook._setattr_cm(self.figure, dpi=dpi):
--> 902 bbox, info, descent = self._get_layout(self._renderer)
903 x, y = self.get_unitless_position()
904 x, y = self.get_transform().transform((x, y))

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/text.py in _get_layout(self, renderer)
293 clean_line, ismath = self._preprocess_math(line)
294 if clean_line:
--> 295 w, h, d = renderer.get_text_width_height_descent(
296 clean_line, self._fontproperties, ismath=ismath)
297 else:

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
231 if ismath:
232 ox, oy, width, height, descent, fonts, used_characters =
--> 233 self.mathtext_parser.parse(s, self.dpi, prop)
234 return width, height, descent
235

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
3330 # mathtext.fontset rcParams also affect the parse (e.g. by affecting
3331 # the glyph metrics).
-> 3332 return self._parse_cached(
3333 s, dpi, prop, rcParams['ps.useafm'], rcParams['mathtext.fontset'])
3334

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/mathtext.py in _parse_cached(self, s, dpi, prop, ps_useafm, fontset)
3345 fontset_class = cbook._check_getitem(
3346 self._font_type_mapping, fontset=fontset)
-> 3347 font_output = fontset_class(prop, backend)
3348
3349 fontsize = prop.get_size_in_points()

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/mathtext.py in init(self, *args, **kwargs)
907 })
908 for key, name in self._fontmap.items():
--> 909 fullpath = findfont(name)
910 self.fontmap[key] = fullpath
911 self.fontmap[name] = fullpath

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/font_manager.py in findfont(self, prop, fontext, directory, fallback_to_default, rebuild_if_missing)
1309 "font.serif", "font.sans-serif", "font.cursive", "font.fantasy",
1310 "font.monospace"])
-> 1311 filename = self._findfont_cached(
1312 prop, fontext, directory, fallback_to_default, rebuild_if_missing,
1313 rc_params)

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/font_manager.py in _findfont_cached(self, prop, fontext, directory, fallback_to_default, rebuild_if_missing, rc_params)
1358 default_prop = prop.copy()
1359 default_prop.set_family(self.defaultFamily[fontext])
-> 1360 return self.findfont(default_prop, fontext, directory,
1361 fallback_to_default=False)
1362 else:

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/font_manager.py in findfont(self, prop, fontext, directory, fallback_to_default, rebuild_if_missing)
1309 "font.serif", "font.sans-serif", "font.cursive", "font.fantasy",
1310 "font.monospace"])
-> 1311 filename = self._findfont_cached(
1312 prop, fontext, directory, fallback_to_default, rebuild_if_missing,
1313 rc_params)

~/opt/anaconda3/envs/cilocharging/lib/python3.9/site-packages/matplotlib/font_manager.py in _findfont_cached(self, prop, fontext, directory, fallback_to_default, rebuild_if_missing, rc_params)
1361 fallback_to_default=False)
1362 else:
-> 1363 raise ValueError(f"Failed to find font {prop}, and fallback "
1364 f"to the default font was disabled")
1365 else:

ValueError: Failed to find font DejaVu Sans:style=normal:variant=normal:weight=normal:stretch=normal:size=10.0, and fallback to the default font was disabled

Expected outcome

bar chart like here
https://matplotlib.org/stable/gallery/scales/log_bar.html#sphx-glr-gallery-scales-log-bar-py

Additional information

This was working on windows.
I get the same problem in within and outside of jupyter notebook.

Operating system

macOS

Matplotlib Version

3.3.4

Matplotlib Backend

module://ipykernel.pylab.backend_inline

Python version

3.9.2

Jupyter version

No response

Installation

conda