(self, amount=None)
Increments the value option by amount.

        amount defaults to 1.0 if omitted.
Increments the value option by amount.
Increments the value option by amount .
def step(self, amount=None):
        """Increments the value option by amount.

        amount defaults to 1.0 if omitted."""
        self.tk.call(self._w, "step", amount)
def step ( self , amount = None ) : self . tk . call ( self . _w , "step" , amount )