numpy.frompyfunc¶
-
numpy.
frompyfunc
(func, nin, nout)¶ 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).
Parameters: func : Python function object
An arbitrary Python function.
nin : int
The number of input arguments.
nout : int
The number of objects returned by func.
Returns: out : ufunc
Returns a NumPy universal function (
ufunc
) object.See also
vectorize
- evaluates pyfunc over input arrays using broadcasting rules of numpy
Notes
The returned ufunc always returns PyObject arrays.
Examples
Use frompyfunc to add broadcasting to the Python function
oct
:>>> oct_array = np.frompyfunc(oct, 1, 1) >>> oct_array(np.array((10, 30, 100))) array([012, 036, 0144], dtype=object) >>> np.array((oct(10), oct(30), oct(100))) # for comparison array(['012', '036', '0144'], dtype='|S4')