当输入：import matplotlib.pyplot as plt时，显示：

runfile('C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py', wdir='C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib')

Traceback (most recent call last):

  File "", line 1, in

    runfile('C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py', wdir='C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib')

  File "C:\Users\IBM\Anaconda3\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 699, in runfile

    execfile(filename, namespace)

  File "C:\Users\IBM\Anaconda3\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 88, in execfile

    exec(compile(open(filename, 'rb').read(), filename, 'exec'), namespace)

  File "C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py", line 1421, in

    _rebuild()

  File "C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py", line 1406, in _rebuild

    fontManager = FontManager()

  File "C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py", line 1044, in __init__

    self.ttffiles = findSystemFonts(paths) + findSystemFonts()

  File "C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py", line 313, in findSystemFonts

    for f in win32InstalledFonts(fontdir):

  File "C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py", line 231, in win32InstalledFonts

    direc = os.path.abspath(direc).lower()

  File "C:\Users\IBM\Anaconda3\lib\ntpath.py", line 535, in abspath

    path = _getfullpathname(path)

ValueError: _getfullpathname: embedded null character

解决办法：

打开：font_manager.py

路径自己看下（可能不同）：

C:/Users/IBM/Anaconda3/lib/site-packages/matplotlib/font_manager.py。

在231行，（前后几行找找）

把：direc = os.path.abspath(direc).lower()

改为：direc = direc.split('\0', 1)[0]

保存，运行。ok啦