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numpy.poly1d.integ
poly1d.integ(m=1, k=0)[source]- 
    
Return an antiderivative (indefinite integral) of this polynomial.
Refer to
polyintfor full documentation.See also
polyint- equivalent function
 
 
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 https://docs.scipy.org/doc/numpy-1.15.4/reference/generated/numpy.poly1d.integ.html