tft_expr.py 文件源码

def __eq__ (self, rhs): 
        if (not isinstance(rhs, ConstantExpr)): 
            return False 
        if (self.type() == rhs.type()): 
            return (self.value() == rhs.value()) 
        elif (self.type() == int and rhs.type() == Fraction): 
            return (Fraction(self.value(), 1) == rhs.value())
        elif (self.type() == Fraction and rhs.type() == int): 
            return (self.value() == Fraction(rhs.value(), 1))
        else:
            sys.exit("ERROR: invlaid __eq__ scenario of ConstExpr")