tuple 元组变数
Python 基础: tuple 元组变数
Categories:
与 list 串列 功能一样，但资料不能被修改
List 串列与 Tuple 元组差异
| 差异 | List 串列 | Tuple 元组 |
|---|---|---|
| 内容 | 内容可改变，新增与删除 | 内容不可异动 |
| 执行速度 | 较慢 | 较快 |
| 安全 | 较低 | 较高，因为资料不会被异动 |
一般 tuple 元组
tuple_1 = (1, 2, 3, 4, 5)
print("tuple_1: ", tuple_1)
print("tuple_1[3]: ", tuple_1[3])
# tuple_1: (1, 2, 3, 4, 5)
# tuple_1[3]: 4
tuple_1 = (1, "KJ", True)
print("tuple_1: ", tuple_1)
# tuple_1: (1, 'KJ', True)
重複 tuple 元组
tuple_1 = (1, 2, 3)
tuple_2 = tuple_1 * 2
print("tuple_1: ", tuple_1)
print("tuple_2: ", tuple_2)
# tuple_1: (1, 2, 3)
# tuple_2: (1, 2, 3, 1, 2, 3)
取得 tuple 元组中间元素
tuple_1 = (1, 2, 3, 4, 5, 6, 7)
tuple_2 = tuple_1[2:5]
print("tuple_1: ", tuple_1)
print("tuple_2: ", tuple_2)
# tuple_1: (1, 2, 3, 4, 5, 6, 7)
# tuple_2: (3, 4, 5)
错误案例
无法修改
TypeError: ’tuple’ object does not support item assignment
tuple_1 = (1, 2, 3, 4, 5, 6, 7)
tuple_1[3] = 33
# TypeError: 'tuple' object does not support item assignment
无法删除
TypeError: ’tuple’ object does not support item deletion
tuple_1 = (1, 2, 3, 4, 5, 6, 7)
del tuple_1[2:5]
# TypeError: 'tuple' object does not support item deletion