the day of python learning(字典)

#数据类型划分：可变数据类型，不可变数据类型
"""
不可变数据类型：元祖，bool，int，str   可哈希
可变数据类型：list，dict，set         不可哈希
dict key 必须是不可变数据类型，可哈希
    value：任意数据类型
dict 优点：二分查找去查询
            存储大量的关系型数据
    特点：无序的
"""

dic1 = {"age":18, "name":'ren','sex':'male'}
#字典的增加
#dic1['high'] = 185    #没有键值对，添加
#dic1['age'] = 16    #如果有键，则值覆盖

#dic1.setdefault('weight')  #有键值对，不做任何改变，没有才添加
# dic1.setdefault('weight',150)
# dic1.setdefault('name','二哥')
# print(dic1)

#字典的删除
# print(dic1.pop('age'))  #有返回值，按键去删除
# print(dic1.pop('二哥',None))#可设置返回值
# print(dic1)
#
# print(dic1.popitem())#随机删除 有返回值  元组里面是删除的键值
# print(dic1)

# del dic1['name1']
# print(dic1)#会报错
# del dic1
# print(dic1)
#
# dic1.clear()#清空字典

#字典的修改
# dic1['age'] = 16
# dic  = {'name':'jin','age': 18, 'sex':'male'}
# dic2 = {'name':'alex','weight':75}
# dic2.update(dic)
# print(dic)
# print(dic2)

#字典的查找
# print(dic1.keys(),type(dic1.keys()))
# print(dic1.values())
# print(dic1.items())

#for i in dic1:
    # print(i)
# for i in dic1.keys():
#     print(i)
#结果一样，直接for i in dic1:

# for i in dic1.values():
#     print(i)

# a,b = 1,2
# print(a,b)
#
# a = 1
# b = 2
# a,b = b,a
# print(a,b)
# a,b = [1,2],[2,3]
# print(a,b)
#
# for k,v in dic1.items():
#     print(k,v)
#
# v1 = dic1['name']
# print(v1)
#
# v2 = dic1['name1']#报错
# print(v2)
#
# print(dic1.get('name1','没有这个键'))

#字典的嵌套
# dic = {
#     'name':['alex','wusir','taibai'],
#     'py9':{
#         'time':'1213',
#         'learn_money':19800,
#         'addr':'CBD'
#     },
#     'age':21
# }
# dic['age'] = 56
# print(dic['name'])
# dic['name'].append('renxin')
# print(dic)
# l = [1,2,'wusir']
# l[2] = l[2].upper()
# dic['name'][1] = dic['name'][1].upper()
# print(dic)
#
#
# """female:6"""
# dic['py9']['female'] = 6
# print(dic)



#输入一组数字。将其打印出数字的个数，包括连接的整数
info = input('>>>').strip()
for i in info:
    if i.isalpha():
        info = info.replace(i," ")
l = info.split()
print(len(l))