元组；字典·；迭代查询·

# a=input('请输入字符串：')
# b=0
# i=0
# while i<len(a):
#     if '0'<=a[i]<='9':
#         b=b*10+int(a[i])
#     i+=1
# print(b)

‘’‘元组’’’

# a=(1,2,3,4,5,6,7)
# print(type(a))                              #type：tuple元组
# for i in a:
#     print(i)

# i=0
# while i<len(a):
#     print('第{}个数是{}'.format(i+1,a[i]))
#     i+=1

print(a[6:0:-1]
     #6是下标对应的最后一个，0对应第一个但是是开区间取不到下标为0的，-1是倒序
print(a[-1:-3:-1])

# b=(1)
# print(type(b))
# b=(1,)              #元组中只有一个元素是必须在后面加 ， 才是元组，否则是整数
# print(type(b))
# b=()

# print(type(b))                    #tyoe:元组
# a,b=(1,2,3)                         #报错
# a,b=(1,)                               #报错
# a,b="xy"
# print(a)
# print(b)

# a=(1,2,3)
# b=[4,5,6]
# i=0
# for ys in a:
#     b.insert(i,ys)
#     i+=2
# print(b)
# b.extend(a)                  #只有列表可以更改
# a.extend(b)                 #元组不可更改
# print(a)
# print(b)

# a=[[1,2,3],[4,5],[6,7,8],['a','b','c']]
'''while-while'''
# i=0
# while i<len(a):
#     j=0
#     while j<len(a[i]):
#         print(a[i][j],end=' ')
#         j+=1
#     print()
#     i+=1

'''while-for'''
# i=0
# while i<len(a):
#    for j in a[i]:
#         print(j,end=' ')
#    print()
#    i+=1
# print(a[i],type(a[i]))
'''for-while'''
# for i in a:
#     j=0
#     while j<len(i):
#         print(i[j],end=' ')
#         j+=1
#     print()
'''for-for'''
# for i in a:                           # i 是元素
#     for j in i:
#         print(j,end=' ')
#     print()

# for i in range(0,len(a),1):             # range里i 是下标
#     for j in range(0,len(a[i]),1):
#         print(a[i][j],end=' ')
#     print()

‘’‘字典’’’

# a={'name':'小红','age':18,'sex':'女','address':'辽宁'}
# print(a['name'])
# print(a.keys())
# a['name']='小明'                  #修改
# print(a)
# a['age']=99
# print(a)
# a['sex']='男'
# print(a)
# del a['name']
# print(a)
# a.pop('sex')
# print(a)

# b=dict(name='李雷',age=20,address='教科书')
# print(b)
# print(b[sex])

# print(b.get('name'))
# print(b.get('sex','男'))                # get 没有的，输出的是后边的值
# print(b)
# print(b.get('name','小红'))             #get 的是存在的，输出的是原值

# print(b.keys())                         #输出 键
# for key in b.keys():
#     print(key,b[key])                   #输出 值
# print(b.values())

# for v in b.values():
#     print(v)

# a={'name':'韩梅梅','age':'14','sex':'女'}
# for k,v in a.items():
#     print(k,v)
#
# a.pop('name')
# print(a.pop('name'))
# print(a)
# print(a)
# a.pop('name')
# print(a)
# print(a.popitem())                   #打印出 删除的最后一个
# print(a)

# a='123'*9
# print(a)
# b='我是'+'小可爱'
# print(b)

# a={
#     '001':{'name':'张三','age':19,'address':'北京'},
#     '002':{'name':'李四','age':18,'address':'上海'},
#     '003':{'name':'王五','age':20,'address':'广州'},
#     '004':{'name':'小红','age':24,'address':'北京'},
#     '005':{'name':'李明','age':22,'address':'广州'}
# }
# for i,j in a.items():
#     if j['address']=='北京':
#         j['house']=10000
        #print(i,a[i])
# for k in a.keys():                #迭代查询 a 的键
#     if a[k]['address']=='北京':
    #a[k]是k对应的值 值是字典，那么用字典[address]或地址的值 如：北京
#         a[k]['house']=10000           #在值的字典里增加[house]项
# for i,j in a.items():
#     print(i,j)

# for i in a.keys():          # 把 a 里面的值一个个拿出来给 i
#     print(i,end=' ')
#     for k in a[i].keys():         
                 #a[i]是i 对应的value，也是一个字典，字典有keys属性
#         print(k,a[i][k],end=' ')
#     for k,v in a[i].items():
#         print(k,v,end=' ')
#     print()