Python OR 运算符和括号

示例 1 - 这有效:

def thisorthat(): 
    var = 2 
 
    if (var == 3 or var == 2): 
        print "i see the second value" 
    elif (var == 2 or var == 15): 
        print "I don't see the second value" 
 
thisorthat() 

示例 2 - 这不起作用:

def thisorthat(): 
    var = 2 
 
    if var == (3 or 2): 
        print "i see the second value" 
    elif var == (2 or 15): 
        print "I don't see the second value" 
 
thisorthat() # "I don't see the second value" 

有没有一种方法可以将变量与“或”运算符进行比较，而无需在每一行中重复变量两次？