上传者: 38668160 
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                                    上传时间: 2021-11-17 19:50:52
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                                    文件大小: 29KB
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                                    文件类型: -
                                
                            
                                
                            
                                问题描述:
运行一段程序的时候会提示:
Traceback (most recent call last):
  File "sigmoid.py", line 3, in
    import matplotlib.pylab as plt
  File "D:\software\python\python37\lib\site-packages\matplotlib\__init__.py", line 205, in
    _check_versions()
  File "D:\software\python\python37\lib\site-packages\matplotlib