ufunc
numpy.ufunc.types
numpy.ufunc.signature
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