add(other, rho=0, inplace=True)
        Adds an *other* number instance. The correlation coefficient *rho* can be configured per
        uncertainty when passed as a dict. When *inplace* is *False*, a new instance is returned.

def add(self, *args, **kwargs):
        """ add(other, rho=0, inplace=True)
        Adds an *other* number instance. The correlation coefficient *rho* can be configured per
        uncertainty when passed as a dict. When *inplace* is *False*, a new instance is returned.
        """
        return self._apply(operator.add, *args, **kwargs)