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numpy.recarray.cumsum
method
recarray.cumsum(axis=None, dtype=None, out=None)- 
    
Return the cumulative sum of the elements along the given axis.
Refer to
numpy.cumsumfor full documentation.See also
numpy.cumsum- equivalent function
 
 
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 https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.recarray.cumsum.html