How to solve the error when importing matplotlib in Anaconda on macOS?

Question

I am using Python 3.6.5 in macOs 10.13.6 and I can not import matplotlib . I have uninstalled and reinstalled matplotlib with conda without results.

Python 3.6.5 | packaged by conda-forge | (default, Apr  6 2018, 13:44:09)
[GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)] on darwin
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>>> import matplotlib.pyplot as plt
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/sergiobacelar/anaconda3/lib/python3.6/site-packages/matplotlib/__init__.py", line 127, in <module>
    from . import cbook
  File "/Users/sergiobacelar/anaconda3/lib/python3.6/site-packages/matplotlib/cbook/__init__.py", line 2640, in <module>
    class _StringFuncParser(object):
  File "/Users/sergiobacelar/anaconda3/lib/python3.6/site-packages/matplotlib/cbook/__init__.py", line 2652, in _StringFuncParser
    _funcs['quadratic'] = _FuncInfo(np.square,
AttributeError: module 'numpy' has no attribute 'square'

Answer 1

As mentioned by ImportanceOfBeingErnest it seems that matplotlib cannot import numpy, so try to uninstall and reinstall numpy with conda and tell us what you get. This seems to be a duplicate: How to fix AttributeError: module 'numpy' has no attribute 'square' Where your problem has been solved ;)

However it seems to me that when installing Anaconda, matplotlib and numpy are both preinstalled. Did you make change is these installations at some point ?