vectorize(somefunction, otypes=None, doc=None)
 Generalized Function class.

  Description:

    Define a vectorized function which takes nested sequence
    objects or numpy arrays as inputs and returns a
    numpy array as output, evaluating the function over successive
    tuples of the input arrays like the python map function except it uses
    the broadcasting rules of numpy.

  Input:

    somefunction -- a Python function or method

  Example:

    def myfunc(a, b):
        if a > b:
            return a-b
        else
            return a+b

    vfunc = vectorize(myfunc)

    >>> vfunc([1, 2, 3, 4], 2)
    array([3, 4, 1, 2])