I get this error while tring to plot some data:

findfont: Font family ['STIXGeneral'] not found. Falling back to DejaVu Sans.
Traceback (most recent call last):
  File "F:/Python/compairing-epsilons/main.py", line 71, in <module>
    c_1=Bandit.experiment(m1,m2,m3 ,0.1 ,100000)
  File "F:/Python/compairing-epsilons/main.py", line 62, in experiment
    plt.show()
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\pyplot.py", line 368, in show
    return _backend_mod.show(*args, **kwargs)
  File "E:\MyProgramFiles\JetBrains\PyCharm 2020.1\plugins\python\helpers\pycharm_matplotlib_backend\backend_interagg.py", line 27, in __call__
    manager.show(**kwargs)
  File "E:\MyProgramFiles\JetBrains\PyCharm 2020.1\plugins\python\helpers\pycharm_matplotlib_backend\backend_interagg.py", line 99, in show
    self.canvas.show()
  File "E:\MyProgramFiles\JetBrains\PyCharm 2020.1\plugins\python\helpers\pycharm_matplotlib_backend\backend_interagg.py", line 64, in show
    self.figure.tight_layout()
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\figure.py", line 3199, in tight_layout
    pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\tight_layout.py", line 325, in get_tight_layout_figure
    pad=pad, h_pad=h_pad, w_pad=w_pad)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\tight_layout.py", line 82, in _auto_adjust_subplotpars
    bb  = [ax.get_tightbbox(renderer, for_layout_only=True)]
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\axes\_base.py", line 4620, in get_tightbbox
    renderer, for_layout_only=for_layout_only)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\axis.py", line 1105, in get_tightbbox
    self._update_label_position(renderer)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\axis.py", line 2083, in _update_label_position
    bboxes, bboxes2 = self._get_tick_boxes_siblings(renderer=renderer)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\axis.py", line 1881, in _get_tick_boxes_siblings
    tlb, tlb2 = axis._get_tick_bboxes(ticks_to_draw, renderer)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\axis.py", line 1086, in _get_tick_bboxes
    for tick in ticks if tick.label1.get_visible()],
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\axis.py", line 1086, in <listcomp>
    for tick in ticks if tick.label1.get_visible()],
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\text.py", line 910, in get_window_extent
    bbox, info, descent = self._get_layout(self._renderer)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\text.py", line 318, in _get_layout
    clean_line, self._fontproperties, ismath=ismath)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\backends\backend_agg.py", line 265, in get_text_width_height_descent
    self.mathtext_parser.parse(s, self.dpi, prop)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\mathtext.py", line 435, in parse
    return self._parse_cached(s, dpi, prop, _force_standard_ps_fonts)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\mathtext.py", line 447, in _parse_cached
    font_output = fontset_class(prop, backend)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\_mathtext.py", line 577, in __init__
    self.cm_fallback = StixSansFonts(*args, **kwargs)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\_mathtext.py", line 681, in __init__
    fullpath = findfont(name)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\font_manager.py", line 1309, in findfont
    rc_params)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\font_manager.py", line 1362, in _findfont_cached
    fallback_to_default=False)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\font_manager.py", line 1309, in findfont
    rc_params)
  File "F:\Python\compairing-epsilons\lib\site-packages\matplotlib\font_manager.py", line 1364, in _findfont_cached
    raise ValueError(f"Failed to find font {prop}, and fallback "
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

Process finished with exit code 1

I don't get this font error for my other project while plotting. how can solve error?

CodePudding user response：

Based on this github issue try deleting everything in the cache directory of matplotlib

import matplotlib
print(matplotlib.get_cachedir()) # should return something like ~/.matplotlib

Navigate to that directory and delete the fonts file, which will be something like fontlist-v330.json