48

我正在尝试在 OS X 10.8.4 上启动并运行 matplotlib。我已经安装了 matplotlib 和依赖项（libping、freetype、numpy、scipy）。我可以很好地导入 matplotlib。但是，如果我尝试导入 matplotlib.pyplot，它就会挂起。没有错误，只是什么都没有发生。

>>> import matplotlib.pyplot

...我已经等了大概 20 分钟，没有任何反应。我使用的是 1.2.1 版，但我什至卸载了它并尝试了 1.2.0 版，但无济于事。我在 SO 上看到了许多关于 matplotlib.pyplot 导入错误的问题，但没有任何问题。然后我尝试使用 Enthought/Canopy python 发行版让它工作，但同样是同样的悬而未决的问题。如果我终止导入，这就是我看到的：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/pyplot.py", line 26, in <module>
    from matplotlib.figure import Figure, figaspect
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/figure.py", line 34, in <module>
    import matplotlib.colorbar as cbar
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/colorbar.py", line 29, in <module>
    import matplotlib.collections as collections
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/collections.py", line 23, in <module>
    import matplotlib.backend_bases as backend_bases
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 37, in <module>
    import matplotlib.widgets as widgets
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/widgets.py", line 17, in <module>
    from lines import Line2D
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/lines.py", line 25, in <module>
    from matplotlib.font_manager import FontProperties
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/font_manager.py", line 1335, in <module>
    _rebuild()
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/font_manager.py", line 1322, in _rebuild
    fontManager = FontManager()
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/font_manager.py", line 980, in __init__
    self.ttffiles = findSystemFonts(paths) + findSystemFonts()
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/font_manager.py", line 317, in findSystemFonts
    for f in get_fontconfig_fonts(fontext):
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/matplotlib/font_manager.py", line 274, in get_fontconfig_fonts
    output = pipe.communicate()[0]
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/subprocess.py", line 746, in communicate
    stdout = _eintr_retry_call(self.stdout.read)
  File "/Applications/Canopy.app/appdata/canopy-1.0.3.1262.macosx-x86_64/Canopy.app/Contents/lib/python2.7/subprocess.py", line 478, in _eintr_retry_call
    return func(*args)
KeyboardInterrupt

当我使用 OS X 附带的默认 python 2.7 时，输出是相同的。

更新

允许import matplotlib.pyplot运行几个小时然后中断导入现在给我这个输出：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/matplotlib/pyplot.py", line 26, in <module>
    from matplotlib.figure import Figure, figaspect
  File "/Library/Python/2.7/site-packages/matplotlib/figure.py", line 34, in <module>
    import matplotlib.colorbar as cbar
  File "/Library/Python/2.7/site-packages/matplotlib/colorbar.py", line 29, in <module>
    import matplotlib.collections as collections
  File "/Library/Python/2.7/site-packages/matplotlib/collections.py", line 23, in <module>
    import matplotlib.backend_bases as backend_bases
  File "/Library/Python/2.7/site-packages/matplotlib/backend_bases.py", line 37, in <module>
    import matplotlib.widgets as widgets
  File "/Library/Python/2.7/site-packages/matplotlib/widgets.py", line 17, in <module>
    from lines import Line2D
  File "/Library/Python/2.7/site-packages/matplotlib/lines.py", line 25, in <module>
    from matplotlib.font_manager import FontProperties
  File "/Library/Python/2.7/site-packages/matplotlib/font_manager.py", line 1335, in <module>
    _rebuild()
  File "/Library/Python/2.7/site-packages/matplotlib/font_manager.py", line 1322, in _rebuild
    fontManager = FontManager()
  File "/Library/Python/2.7/site-packages/matplotlib/font_manager.py", line 980, in __init__
    self.ttffiles = findSystemFonts(paths) + findSystemFonts()
  File "/Library/Python/2.7/site-packages/matplotlib/font_manager.py", line 324, in findSystemFonts
    files = list_fonts(path, fontexts)
  File "/Library/Python/2.7/site-packages/matplotlib/font_manager.py", line 171, in list_fonts
    return cbook.listFiles(directory, pattern)
  File "/Library/Python/2.7/site-packages/matplotlib/cbook.py", line 944, in listFiles
    for dirname, dirs, files in os.walk(root):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 294, in walk
    for x in walk(new_path, topdown, onerror, followlinks):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 284, in walk
    if isdir(join(top, name)):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/genericpath.py", line 41, in isdir
    st = os.stat(s)
KeyboardInterrupt

有谁知道递归for x in walk(new_path, topdown, onerror, followlinks):可能表示什么？

4

3 回答 3

92

You can fix the problem on Mac OS X Mavericks and Yosemite by doing the following:

cd ~/.matplotlib/
fc-list  # Should take a couple minutes.

After fc-list finishes running you will be able to import the package using import matplotlib.pyplot as plt. This is the github issue with the solution. It seems the bug is related to the font cache.

于 2014-07-27T14:48:23.893 回答
3

我弄清楚发生了什么。希望该解决方案对其他人有用。在/usr/X11/lib文件夹中有一个指向自身的目录的符号链接。这似乎创建了一个无限循环。当我删除链接时，导入工作。

于 2013-07-05T21:51:51.750 回答
1

我在 Linux 上遇到了同样的问题。

原来 matplotlib 在确定要使用的 GUI 后端时遇到了一些问题。

明确地说它使用 Tkinter 背景 - 它默认使用以下命令解决了这个问题：

%matplotlib tk

这之后是导入

import matplotlib.pyplot as plt

按预期工作。

于 2017-12-28T20:22:00.567 回答