python中运算符

# Python 中的运算符示例

# 1. 算术运算符
a = 10
b = 3

# 加法
print("a + b =", a + b)  # 输出: a + b = 13

# 减法
print("a - b =", a - b)  # 输出: a - b = 7

# 乘法
print("a * b =", a * b)  # 输出: a * b = 30

# 除法
print("a / b =", a / b)  # 输出: a / b = 3.3333333333333335

# 取整除
print("a // b =", a // b)  # 输出: a // b = 3

# 取余
print("a % b =", a % b)  # 输出: a % b = 1

# 幂运算
print("a ** b =", a ** b)  # 输出: a ** b = 1000


# 2. 比较运算符
x = 5
y = 8

# 等于
print("x == y:", x == y)  # 输出: x == y: False

# 不等于
print("x != y:", x != y)  # 输出: x != y: True

# 大于
print("x > y:", x > y)  # 输出: x > y: False

# 小于
print("x < y:", x < y)  # 输出: x < y: True

# 大于等于
print("x >= y:", x >= y)  # 输出: x >= y: False

# 小于等于
print("x <= y:", x <= y)  # 输出: x <= y: True


# 3. 赋值运算符
m = 5
n = 3

m += n  # 等价于 m = m + n
print("m += n:", m)  # 输出: m += n: 8

m -= n  # 等价于 m = m - n
print("m -= n:", m)  # 输出: m -= n: 5

m *= n  # 等价于 m = m * n
print("m *= n:", m)  # 输出: m *= n: 15

m /= n  # 等价于 m = m / n
print("m /= n:", m)  # 输出: m /= n: 5.0

m %= n  # 等价于 m = m % n
print("m %= n:", m)  # 输出: m %= n: 2.0

m **= n  # 等价于 m = m ** n
print("m **= n:", m)  # 输出: m **= n: 8.0

m //= n  # 等价于 m = m // n
print("m //= n:", m)  # 输出: m //= n: 2.0


# 4. 逻辑运算符
p = True
q = False

# 逻辑与
print("p and q:", p and q)  # 输出: p and q: False

# 逻辑或
print("p or q:", p or q)  # 输出: p or q: True

# 逻辑非
print("not p:", not p)  # 输出: not p: False


# 5. 位运算符
i = 6  # 二进制: 110
j = 2  # 二进制: 010

# 按位与
print("i & j:", i & j)  # 输出: i & j: 2

# 按位或
print("i | j:", i | j)  # 输出: i | j: 6

# 按位异或
print("i ^ j:", i ^ j)  # 输出: i ^ j: 4

# 左移
print("i << 1:", i << 1)  # 输出: i << 1: 12

# 右移
print("i >> 1:", i >> 1)  # 输出: i >> 1: 3


# 6. 成员运算符
list_example = [1, 2, 3, 4, 5]

# in 运算符
print("3 in list_example:", 3 in list_example)  # 输出: 3 in list_example: True

# not in 运算符
print("6 not in list_example:", 6 not in list_example)  # 输出: 6 not in list_example: True


# 7. 身份运算符
x = [1, 2, 3]
y = [1, 2, 3]
z = x

# is 运算符
print("x is z:", x is z)  # 输出: x is z: True

# is not 运算符
print("x is not y:", x is not y)  # 输出: x is not y: True