【Python爬虫】-第三课时作业

Code

#1定义列表

list1=['life','is','short']

list2=['you','need','python']

#1)

index=list2.index('python')

print(list2[2])

print(index)

#2)

list1.append(',')

list2.append('!')

print(list1)

print(list2)

#3

list1.extend(list2)

print(len(list1))

#4

list2.remove('python')

list2.insert(2,'python3')

print(list2 )

#5

list1.remove(',')

list1.remove('!')

print(list1)

#2自定义

tuple=(1,2,'3',4,'Fun',True,'False')

print(type(tuple))

print(len(tuple))

print(tuple[4])

#3列表

list_set1=['life','is','short']

list_set2=['you','need','python']

list_set3=[1,2,3,4,5,3,4,2,1,5,7,9]

#1

list_set1=set(list_set1)

print(list_set1)

print(type(list_set1))

#2

list_set2=set(list_set2)

list_set2.update(list_set1)

print(list_set2)

#3

print(len(list_set2))

print(len(list_set1))

#4

list_set2.remove('python')

print(list_set2)

#5

list_set2.add('python3')

print(list_set2)

---

Output:

python2['life', 'is', 'short', ',']

['you', 'need', 'python', '!']

8

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

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

7

Fun

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

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

6

3

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

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