set_numeric_ops(op1=func1, op2=func2, ...)
For the general case, use :c:func:`PyUFunc_ReplaceLoopBySignature`. For ndarray subclasses, define the __array_ufunc__
method and override the relevant ufunc.
.. WARNING::
Use with care! Incorrect usage may lead to memory errors.
A function replacing an operator cannot make use of that operator. For example, when replacing add, you may not use +
. Instead, directly call ufuncs.
Each op = func
pair describes an operator to be replaced. For example, add = lambda x, y: np.add(x, y) % 5
would replace addition by modulus 5 addition.
A list of all operators, stored before making replacements.
Set numerical operators for array objects.
>>> def add_mod5(x, y):
... return np.add(x, y) % 5 ...
>>> old_funcs = np.set_numeric_ops(add=add_mod5)
>>> x = np.arange(12).reshape((3, 4))
... x + x array([[0, 2, 4, 1], [3, 0, 2, 4], [1, 3, 0, 2]])
>>> ignore = np.set_numeric_ops(**old_funcs) # restore operatorsSee :
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