ufunc
ufunc.
identity
The identity value.
Data attribute containing the identity element for the ufunc, if it has one. If it does not, the attribute value is None.
Examples
>>> np.add.identity 0 >>> np.multiply.identity 1 >>> np.power.identity 1 >>> print(np.exp.identity) None
numpy.ufunc.types
numpy.ufunc.signature