numpy.frompyfunc — NumPy v1.11 Manual (original) (raw)
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. |
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')