numpy.ndarray.__nonzero__
- 
ndarray.__nonzero__
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x.__nonzero__() <==> x != 0 
    © 2008–2016 NumPy Developers
Licensed under the NumPy License.
    https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.ndarray.__nonzero__.html
  
ndarray.__nonzero__ x.__nonzero__() <==> x != 0
    © 2008–2016 NumPy Developers
Licensed under the NumPy License.
    https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.ndarray.__nonzero__.html