y : array_like
A vector of 2**k + 1 equally-spaced samples of a function.
dx : array_like, optional
The sample spacing. Default is 1.
axis : array_like?, optional
The axis along which to integrate. Default is -1 (last axis).
show : bool, optional
When y is a single 1-D array, then if this argument is True
print the table showing Richardson extrapolation from the
samples. Default is False.