元组 列表

Tuple ¶

叫做 tuple，用小括号、或者无括号来表述，是一连串有顺序的数字。

a_tuple = (12, 3, 5, 15 , 6)
another_tuple = 12, 3, 5, 15 , 6

List ¶

而list是以中括号来命名的:

a_list = [12, 3, 67, 7, 82]

两者对比 ¶

他们的元素可以一个一个地被迭代、输出、运用、定位取值:

for content in a_list:
    print(content)
"""
12
3
67
7
82
"""

for content_tuple in a_tuple:
    print(content_tuple)
"""
12
3
5
15
6
"""

下一个例子，依次输出a_tuple和a_list中的各个元素：

for index in range(len(a_list)):
    print("index = ", index, ", number in list = ", a_list[index])
"""
index =  0 , number in list =  12
index =  1 , number in list =  3
index =  2 , number in list =  67
index =  3 , number in list =  7
index =  4 , number in list =  82
"""

for index in range(len(a_tuple)):
    print("index = ", index, ", number in tuple = ", a_tuple[index])
"""
index =  0 , number in tuple =  12
index =  1 , number in tuple =  3
index =  2 , number in tuple =  5
index =  3 , number in tuple =  15
index =  4 , number in tuple =  6
"""