def instructions(self):
        """
        The number of instructions in this block
        """
        if self._instructions is None:
            if self.statements is None:
                self._instructions = 0
            else:
                self._instructions = len([s for s in self.statements if type(s) is stmt.IMark])
        return self._instructions
def instructions ( self ) : if self . _instructions is None : if self . statements is None : self . _instructions = 0 else : self . _instructions = len ( [ s for s in self . statements if type ( s ) is stmt . IMark ] ) return self . _instructions
The number of instructions in this block