Functional programming

apply_along_axis(func1d, axis, arr, *args, ...) Apply a function to 1-D slices along the given axis.
apply_over_axes(func, a, axes) Apply a function repeatedly over multiple axes.
vectorize(pyfunc[, otypes, doc, excluded, ...]) Generalized function class.
frompyfunc(func, nin, nout) Takes an arbitrary Python function and returns a NumPy ufunc.
piecewise(x, condlist, funclist, *args, **kw) Evaluate a piecewise-defined function.

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https://docs.scipy.org/doc/numpy-1.13.0/reference/routines.functional.html