【Python爬虫】- 8.13练习题

一、

list1 = ['life', 'is' ,'short']
list2 = ['you', 'need', 'python']

1).

print('index:', list2.index('python'), ',', list2[list2.index('python')])

result:

index: 2 , python

2).

list2.append('!')
list1.insert(list1.index('short')+1, ',')
print(list1)
print(list2)

result:

['life', 'is', 'short', ',']
['you', 'need', 'python', '!']

3).

list3 = ['life', 'is' ,'short']
list3.insert(list3.index('short')+1, ',')
list3.extend(list2)
list3.sort()
print(list3, ' length:', len(list3))

result:

['!', ',', 'is', 'life', 'need', 'python', 'short', 'you']  length: 8

4).

list2[list2.index('python')] = 'python3'
print(list2)

result:

['you', 'need', 'python3', '!']

5).

list1.remove(',')
list2.remove('!')
print(list1)
print(list2)

result:

['life', 'is', 'short']
['you', 'need', 'python3']

二、

aTuple = (1,2,3,4,5)
print(aTuple[3])
print(len(aTuple))

4
5

三、

list1 = ['life', 'is', 'short']
list2 = ['you', 'need', 'python']
list3 = [1,2,3,4,5,3,4,2,1,5,7,9]

1).

list_set1 = set(list1)
print(list_set1)

result:

{'short', 'is', 'life'}

2).

list1.extend(list2)
list_set2 = set(list1)
print(list_set2, ' length:', len(list_set2))

result:

{'short', 'life', 'you', 'python', 'is', 'need'}  length: 6

3).

list_set1.update(list_set2)
list_set1.remove('python')
print(list_set1)

result:

{'short', 'life', 'you', 'is', 'need'}

4).

list_set1.add('python3')
print(list_set1)

result:

{'short', 'python3', 'life', 'you', 'is', 'need'}