2020-10-28 列表

• 列表是Python以及其他语言中最常用到的数据结构之一。Python中使用中括号[]来表示列表
• 列表是由一组任意类型的值组合而成的序列，组成列表的值称为元素，每个元素之间用逗号隔开

课上练习 ↓ ↓ ↓

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("ABCD")
list3 = list(range(10))
for x in list1:
    print(x)
#效果   ↓   ↓   ↓
1
2
3
4
5
6
7
8
9

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("ABCD")
list3 = list(range(10))
print(list1)
print(list2)
print(list3)
#效果   ↓   ↓   ↓
[1, 2, 3, 4, 5, 6, 7, 8, 9]
['A', 'B', 'C', 'D']
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("ABCD")
list3 = list(range(10))
list2[0] = 'DB'
print(list2)
#效果   ↓   ↓   ↓
['DB', 'B', 'C', 'D']

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("BAECDF")
list3 = list(range(10))
print(len(list2))
print(max(list2))
print(min(list2))
print(list(reversed(list2)))
print(sorted(list2))
#效果   ↓   ↓   ↓
6
F
A
['F', 'D', 'C', 'E', 'A', 'B']
['A', 'B', 'C', 'D', 'E', 'F']

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("BAECDF")
list3 = list(range(10))
list2.sort()
print(list2)
#效果   ↓   ↓   ↓
['A', 'B', 'C', 'D', 'E', 'F']

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("ABCD")
list3 = list(range(10))
print(list2.pop(-1))
#效果   ↓   ↓   ↓
D

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("ABCD")
list3 = list(range(10))
list2.append('E')
list2.insert(-2,'F')
list2.extend("HK")
print(list2)
#效果   ↓   ↓   ↓
['A', 'B', 'C', 'F', 'D', 'E', 'H', 'K']

list1 = [1,2,3,4,5,6,7,8,9,]
list2 = list("ABCD")
list3 = list(range(10))
print(list1+list2)
print(list2*3)
#效果   ↓   ↓   ↓
[1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D']
['A', 'B', 'C', 'D', 'A', 'B', 'C', 'D', 'A', 'B', 'C', 'D']