`numpy:frompyfunc`

Summary

Takes an arbitrary Python function and returns a NumPy ufunc.

Can be used, for example, to add broadcasting to a built-in Python function (see Examples section).

func : Python function object: An arbitrary Python function.
nin : int: The number of input arguments.
nout : int: The number of objects returned by func.
identity : object, optional: The value to use for the ~numpy.ufunc.identity attribute of the resulting object. If specified, this is equivalent to setting the underlying C identity field to PyUFunc_IdentityValue. If omitted, the identity is set to PyUFunc_None. Note that this is _not_ equivalent to setting the identity to None, which implies the operation is reorderable.

The returned ufunc always returns PyObject arrays.

Use frompyfunc to add broadcasting to the Python function ``oct``:

import numpy as np
oct_array = np.frompyfunc(oct, 1, 1)
oct_array(np.array((10, 30, 100)))
np.array((oct(10), oct(30), oct(100))) # for comparison