一、定义列表:list1 = ['life','is','short'],
list2 = ['you','need','python']
完成以下几个要求：
1）输出python及其下标
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）将两个字符串合并后，排序并输出其长度
list1 = ['life','is','short']
list2 = ['you','need','python']
list1.extend(list2)
print(len(list1))
print(list1,list1.sort())
4）将 'python' 改为 '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、自己定义元组并练习常用方法（输出元组长度、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、定义列表：
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）构造集合 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）将list1和list2合并构造集合 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）输出两个集合的长度
list_set1=set(list1+list2+list3) list_set2=set(list1+list2) print(len(list_set1),len(list_set2))
4）将两个集合合并后移除 '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)
