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python - matplotlib 字体管理器出错

问题描述

我正在尝试在我的服务器上运行一个简单的脚本来测试 matplolib。脚本就这么简单：

import matplotlib
matplotlib.use('agg')
import matplotlib.pyplot as plt # no error here, it works
plt.figure(1).show()

但是，执行它是不可能的，我收到了这个错误：老实说，我没有想法了

  Traceback (most recent call last):
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/font_manager.py", line 1459, in <module>
    fontManager = json_load(_fmcache)
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/font_manager.py", line 986, in json_load
    return json.load(fh, object_hook=_json_decode)
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/json/__init__.py", line 268, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/json/__init__.py", line 332, in loads
    return cls(**kw).decode(s)
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/font_manager.py", line 977, in json_dump
    json.dump(data, fh, cls=JSONEncoder, indent=2)
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/json/__init__.py", line 179, in dump
    fp.write(chunk)
OSError: [Errno 28] No space left on device

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "test2.py", line 3, in <module>
    import matplotlib.pyplot as plt # no error, it works
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/pyplot.py", line 31, in <module>
    import matplotlib.colorbar
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/colorbar.py", line 36, in <module>
    import matplotlib.contour as contour
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/contour.py", line 20, in <module>
    import matplotlib.font_manager as font_manager
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/font_manager.py", line 1469, in <module>
    _rebuild()
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/font_manager.py", line 1454, in _rebuild
    json_dump(fontManager, _fmcache)
  File "/share/CACHEDEV1_DATA/.qpkg/Python3/python3/lib/python3.5/site-packages/matplotlib/font_manager.py", line 979, in json_dump
    warnings.warn('Could not save font_manager cache ', e)
TypeError: category must be a Warning subclass, not 'OSError'

标签： pythonmatplotlib

解决方案

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