一、定義列表:list1 = ['life','is','short'],

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

   完成以下幾個要求：

1）輸出python及其下標(biāo)

list1 = ['life','is','short']
list2 = ['you','need','python']
print(list2.index('python'))

2）在list2后追加 '!' , 在 'short' 后添加 ',' 

list1 = ['life','is','short']
list2 = ['you','need','python']
n=list1.index('short')
list1.insert(n+1,',')
print(list1)

3）將兩個字符串合并后，排序并輸出其長度

list1 = ['life','is','short']
list2 = ['you','need','python']
list1.extend(list2)
print(len(list1))
print(list1,list1.sort())

4）將 'python' 改為 'python3'

list1 = ['life','is','short']
list2 = ['you','need','python']
list2[list2.index('python')]='python3'
print(list2)

4）移除之前添加的 '!' 和 ','

list1 = ['life','is','short',',']
list2 = ['you','need','python','!']
list1.remove(',')
list2.remove(list2[list2.index('!')])
print(list1,list2)

二、自己定義元組并練習(xí)常用方法（輸出元組長度、指定位置元素等）

tup1 = (1,2,3,4,5,6,7)
tup2 = ('you', 'need', 'python')
print(tup1[0])
print(len(tup2))

三、定義列表：

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

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

     list3 = [1,2,3,4,5,3,4,2,1,5,7,9]

   完成以下操作：

1）構(gòu)造集合 list_set1

list1 = ['life', 'is', 'short']
list2 = ['you', 'need', 'python']
list3 = [1, 2, 3, 4, 5, 3, 4, 2, 1, 5, 7, 9]
list_set1=set(list1+list2+list3)
print(list_set1)

2）將list1和list2合并構(gòu)造集合 list_set2

list1 = ['life', 'is', 'short']
list2 = ['you', 'need', 'python']
list3 = [1, 2, 3, 4, 5, 3, 4, 2, 1, 5, 7, 9]
list_set2=set(list1+list2)
print(list_set2)

3）輸出兩個集合的長度

list_set1=set(list1+list2+list3) list_set2=set(list1+list2) print(len(list_set1),len(list_set2))

4）將兩個集合合并后移除 'python'

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

5）在合并后的新列表中添加 'python3'

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