python之matplotlib 运行时错误 : In select_charmap: Could not set the charmap using latex_编程设计

我尝试运行以下 python 代码(安装了 Python 3.4.7 + scipy；安装了 MikTeX 2.9.4476；Windows 7)

from matplotlib import pyplot as plt 
from matplotlib.pyplot import rc 
 
rc('text', usetex=True) 
 
# plotting 
data = range(100) 
plt.plot(data, data, label='0.3 m') 
 
plt.legend() 
plt.savefig("test.png") 
plt.savefig("test.svg") 
# plt.show()

如果我使用 plt.savefig("test.svg") 或任何其他矢量图形格式，则会出现以下错误。没有这个保存命令一切正常。打印错误:

Traceback (most recent call last): 
  File "U:\ICCAP\S_SVN\ETHAN\test.py", line 12, in <module> 
    plt.savefig("test.svg") 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\pyplot.py", line 688, in savefig 
    res = fig.savefig(*args, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\figure.py", line 1539, in savefig 
    self.canvas.print_figure(*args, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\backend_bases.py", line 2230, in print_figure 
    **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\backends\backend_svg.py", line 1206, in print_svg 
    return self._print_svg(filename, svgwriter, fh_to_close, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\backends\backend_svg.py", line 1234, in _print_svg 
    self.figure.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\artist.py", line 61, in draw_wrapper 
    draw(artist, renderer, *args, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\figure.py", line 1133, in draw 
    func(*args) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\artist.py", line 61, in draw_wrapper 
    draw(artist, renderer, *args, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\axes\_base.py", line 2304, in draw 
    a.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\artist.py", line 61, in draw_wrapper 
    draw(artist, renderer, *args, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\legend.py", line 482, in draw 
    self._legend_box.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\offsetbox.py", line 286, in draw 
    c.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\offsetbox.py", line 286, in draw 
    c.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\offsetbox.py", line 286, in draw 
    c.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\offsetbox.py", line 286, in draw 
    c.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\offsetbox.py", line 867, in draw 
    self._text.draw(renderer) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\artist.py", line 61, in draw_wrapper 
    draw(artist, renderer, *args, **kwargs) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\text.py", line 792, in draw 
    mtext=mtext) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\backends\backend_svg.py", line 1152, in draw_tex 
    self._draw_text_as_path(gc, x, y, s, prop, angle, ismath="TeX") 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\backends\backend_svg.py", line 957, in _draw_text_as_path 
    return_new_glyphs_only=True) 
  File "C:\WinPython-32bit-3.4.3.7Qt5\python-3.4.3\lib\site-packages\matplotlib\textpath.py", line 346, in get_glyphs_tex 
    font.select_charmap(charmap_code) 
RuntimeError: In select_charmap: Could not set the charmap

有什么问题/可以改进的想法吗？

请您参考如下方法:

我也有同样的问题，我通过将 matplotlib 升级到 1.5.1 来修复它。这似乎与 Matplotlib 试图渲染一些字体而没有捕捉到应该被捕捉到的异常有关。