# 一、定义列表:list1 = ['life','is','short'],
# list2 = ['you','need','python']
# 完成以下几个要求：
list1 = ['life', 'is', 'short']
list2 = ['you', 'need', 'python']
# 1）输出python及其下标
print(list2[2])
number = list2.index('python')
print('下标为:', number)
# 2）在list2后追加 '!' , 在 'short' 后添加 ',' #showing none..
print(list2.append('!'))
print(list1.insert(3, ','))
# 3）将两个字符串合并后，排序并输出其长度
list1.extend(list2)
list1.sort()
print(list1)
print(len(list1))
# 4）将 'python' 改为 'python3'
list2.remove('python')
list2.insert(2, 'python3')
print(list2)
#or list2[2]="python"
# print(list2)
# 4）移除之前添加的 '!' 和 ','
list2.remove('!')
list1.remove(',')
print(list1)
print(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）
week_tuple=[1,2,3]
print(len(week_tuple))
print(week_tuple[1])
# 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]
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
list_set1 = set(list1)
print(list_set1)
# 2）将list1和list2合并构造集合 list_set2
list1.extend(list2)
list_set2 = set(list1)
# 3）输出两个集合的长度
print(len(list_set1))
print(len(list_set2))
# 4）将两个集合list_set1、list_set2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)
-----------------
#Output:
python
下标为: 2
None
None
['!', ',', 'is', 'life', 'need', 'python', 'short', 'you']
8
['you', 'need', 'python3', '!']
['!', 'is', 'life', 'need', 'python', 'short', 'you']
['you', 'need', 'python3']
3
2
{'is', 'life', 'short'}
3
6
{'is', 'short', 'life', 'need', 'you'}
{'is', 'python3', 'short', 'life', 'need', 'you'}
