Python 赋值运算符
赋值运算符
赋值运算符用于为变量赋值:
| 运算符 | 示例 | 相同 | 亲自试一试 |
|---|---|---|---|
| = | x = 5 | x = 5 | 亲自试一试 » |
| += | x += 3 | x = x + 3 | 亲自试一试 » |
| -= | x -= 3 | x = x - 3 | 亲自试一试 » |
| *= | x *= 3 | x = x * 3 | 亲自试一试 » |
| /= | x /= 3 | x = x / 3 | 亲自试一试 » |
| %= | x %= 3 | x = x % 3 | 亲自试一试 » |
| //= | x //= 3 | x = x // 3 | 亲自试一试 » |
| **= | x **= 3 | x = x ** 3 | 亲自试一试 » |
| &= | x &= 3 | x = x & 3 | 亲自试一试 » |
| |= | x |= 3 | x = x | 3 | 亲自试一试 » |
| ^= | x ^= 3 | x = x ^ 3 | 亲自试一试 » |
| >>= | x >>= 3 | x = x >> 3 | 亲自试一试 » |
| <<= | x <<= 3 | x = x << 3 | 亲自试一试 » |
| := | print(x := 3) | x = 3 print(x) |
亲自试一试 » |
海象运算符
Python 3.8 引入了 := 运算符,也称为"海象运算符"。它用于在更大的表达式中为变量赋值:
实例
numbers = [1, 2, 3, 4, 5]
count = len(numbers)
if count > 3:
print(f"List has {count} elements")
if (count := len(numbers)) > 3:
print(f"List has {count} elements")
亲自试一试 »

