Python/運算符

算術運算符為：+, -, *, / , %, // , **, _ 分別為加、減、乘、浮點除、取餘數、整數除、冪運算、上個表達式結果的值。

比較運算符為：==, !=, >, <, >=, <= 是做 值 的比較

位運算符：&, |, ^, ~ , >>, <<

邏輯運算符： and, or, not

成員運算符： in, not in 在指定的序列中能否找到該值

身份運算符：is, is not 判斷兩個標識符是不是引用自一個對象，類似 id(x) == id(y) 是做地址比較

walrus運算符：在表達式中執行賦值操作。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]