Python/运算符

算术运算符为：+, -, *, / , %, // , **, _ 分别为加、减、乘、浮点除、取余数、整数除、幂运算、上个表达式结果的值。

比较运算符为：==, !=, >, <, >=, <= 是做 值 的比较

位运算符：&, |, ^, ~ , >>, <<

逻辑运算符： and, or, not

成员运算符： in, not in 在指定的序列中能否找到该值

身份运算符：is, is not 判断两个标识符是不是引用自一个对象，类似 id(x) == id(y) 是做地址比较

walrus运算符：在表达式中执行赋值操作。例如：

# Handle a matched regex
if (match := pattern.search(data)) is not None:
    # Do something with match

# A loop that can't be trivially rewritten using 2-arg iter()
while chunk := file.read(8192):
   process(chunk)

# Reuse a value that's expensive to compute
[y := f(x), y**2, y**3]

# Share a subexpression between a comprehension filter clause and its output
filtered_data = [y for x in data if (y := f(x)) is not None]