Python的List的基本用法如下。
int_list = [1, 2, 3, 4, 5]
print(int_list) # [1, 2, 3, 4, 5]
print(int_list[0]) # 1
print(int_list[1]) # 2
print(int_list[-1]) # 5
print(int_list[-2]) # 4
print(int_list[2:4]) # [3, 4]
print(int_list[0:5:2]) # [1, 3, 5]
print(int_list[:2]) # [1, 2]
print(int_list[2:]) # [3, 4, 5]
int_list.append(6)
print(int_list) # [1, 2, 3, 4, 5, 6]
int_list.insert(3, 13)
print(int_list) # [1, 2, 3, 13, 4, 5, 6]
int_list.remove(13)
print(int_list) # [1, 2, 3, 4, 5, 6]
int_list.extend([21, 22, 23])
print(int_list) # [1, 2, 3, 4, 5, 6, 21, 22, 23]
print(int_list.pop()) # 23
print(int_list) # [1, 2, 3, 4, 5, 6, 21, 22]
int_list[5:] = []
print(int_list) # [1, 2, 3, 4, 5]
print(int_list.count(3)) # 1
print(len(int_list)) # 5
int_list.reverse()
print(int_list) # [5, 4, 3, 2, 1]
str_list = ['a', 'b', 'c']
print(str_list) # ['a', 'b', 'c']
str_list = str_list + ['d', 'e']
print(str_list) # ['a', 'b', 'c', 'd', 'e']
str_list[1:3] = ['x', 'y']
print(str_list) # ['a', 'x', 'y', 'd', 'e']
empty_list = []
print(empty_list) # []
# print(empty_list[0]) # IndexError: list index out of range
for迴圈遍歷List。
int_list = [1, 2, 3, 4, 5]
for n in int_list:
print(n)
印出結果如下。
1
2
3
4
5
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