a = 100a += 1 # 等价于a = a + 1print(a)b = 10b -= 1 # b = b - 1print(b)c = 10c += 1 + 2print(c) # 输出 13# 注意:先计算复合赋值运算符右侧表达式,在计算复合赋值运算(先计算右后赋值计算)c = 10# c = 10 + 1 + 2# c += 3 -- c = c + 3c += 1 + 2print(c)d = 10d *= 1 + 2print(d)