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numpy.generic.cumsum
method
- generic.cumsum()
- 
    Not implemented (virtual attribute) Class generic exists solely to derive numpy scalars from, and possesses, albeit unimplemented, all the attributes of the ndarray class so as to provide a uniform API. See also the corresponding attribute of the derived class of interest. 
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 https://numpy.org/doc/1.19/reference/generated/numpy.generic.cumsum.html