unittest/python/crocoddyl/state.py
def diff(self, x1, x2):
        """ Run the differentiate operator defined in State.

        :param x1: current state
        :param x2: next state
        :return x2 [-] x1 value
        """
        return self.State.diff(x1, x2)
 Run the differentiate operator defined in State.

        :param x1: current state
        :param x2: next state
        :return x2 [-] x1 value
        
Run the differentiate operator defined in State.
Run the differentiate operator defined in State .
def diff(self, x1, x2):
        return self.State.diff(x1, x2)
def diff ( self , x1 , x2 ) : return self . State . diff ( x1 , x2 )
Run the differentiate operator defined in State.
Run the differentiate operator defined in State .
""" Run the differentiate operator defined in State.

        :param x1: current state
        :param x2: next state
        :return x2 [-] x1 value
        """
self
x1
x2