1. 程式人生 > >day04 作業答案

day04 作業答案

1.

1)

li=['alex','WuSir','ritian','barry','wenzhou']
print(len(li))

2)

li=['alex','WuSir','ritian','barry','wenzhou']
li.append('seven')
print(li)

3)

li=['alex','WuSir','ritian','barry','wenzhou']
li.insert(1,'Tony')
print(li)

4)

li=['alex','WuSir','ritian','barry','wenzhou
'] li[2]='Kelly' print(li)

5)

li=['alex','WuSir','ritian','barry','wenzhou']
li2=[1,'a',3,4,'heart']
li.extend(li2)
print(li)

6)

li=['alex','WuSir','ritian','barry','wenzhou']
li2='qwert'
li.extend(li2)
print(li)

7)

li=['alex','WuSir','ritian','barry','wenzhou']
li.remove('alex'
) print(li)

8)

li=['alex','WuSir','ritian','barry','wenzhou']
a=li.pop(2)
print(li)
print(a)

9)

li=['alex','WuSir','ritian','barry','wenzhou']
del li[2:4]
print(li)

10)

li=['alex','WuSir','ritian','barry','wenzhou']
a=[]
li2=li[::-1]
a.extend(li2)
print(a)

11)

li=['alex','
WuSir','ritian','barry','wenzhou'] a=li.count('alex') print(a)

2.

1)

li=[1,3,2,'a',4,'b',5,'c']
l1=li[0:3]
print(l1)

2)

li=[1,3,2,'a',4,'b',5,'c']
l1=li[3:6]
print(l1)

3)

li=[1,3,2,'a',4,'b',5,'c']
l1=li[0::2]
print(l1)

4)

li=[1,3,2,'a',4,'b',5,'c']
l1=li[1:-2:2]
print(l1)

5)

li=[1,3,2,'a',4,'b',5,'c']
l1=li[-1]
print(l1)

6)

li=[1,3,2,'a',4,'b',5,'c']
l1=li[-3:0:-2]
print(l1)

3.

1)

li=[2,3,'k',['qwe',20,['k1',['tt',3,'1']],89],'ab','adv']
li[3][2][1][0]='TT'
lis[3][2][1][0] = lis[3][2][1][0].replace("t", "T")
print(li)