title: how am i able to import matplotlib without an error
body: <p>i have tried several times to import matplotlib and remove reinstall all of the possible combinations<br>
  i am using conda as package management system, and pip points to conda</p>
  
  <p>trying to run following programm:</p>
  
  <pre><code>import matplotlib.pyplot as plt
  </code></pre>
  
  <p>or just: </p>
  
  <pre><code>import matplotlib
  </code></pre>
  
  <p>creates following result:</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:/Users/Name/IdeaProjects/zzArchiv/Robot project/RobotProject/DeepLearning/approaches/hvasstutorial/anothermain.py", line 22, in &lt;module&gt;
      import matplotlib.pyplot as plt
    File "D:\ProgramData\Anaconda3\lib\site-packages\matplotlib\__init__.py", line 127, in &lt;module&gt;
      from . import cbook
    File "D:\ProgramData\Anaconda3\lib\site-packages\matplotlib\cbook\__init__.py", line 2640, in &lt;module&gt;
      class _StringFuncParser(object):
    File "D:\ProgramData\Anaconda3\lib\site-packages\matplotlib\cbook\__init__.py", line 2652, in _StringFuncParser
      _funcs['quadratic'] = _FuncInfo(np.square,
  AttributeError: module 'numpy' has no attribute 'square'
  </code></pre>
  
  <p>i googled a lot and searched left and right, but couldn't get any working solutions (most tell to remove and reinstall numpy/matplotlib which i did several times) please help, if you have any clues</p>
  
  <p>thanks</p>