代码221

#字典

'''a={"name":"张三","age":18,"address":"河北"}
print(a)
print(a["name"])
a["sex"]="男"
print(a)
a["age"]=22
print(a)
del a["name"]
print(a)
a.pop("age")
print(a)
b=[1,2,3,4]
b.pop(0)
print(b)'''

'''a=dict(name="李四",age=16,adress="阿拉斯加")
print(a)
print(a.get("name"))
print(a.get("sex"))
print(a.get("sex","男"))
print(a.get("name","张三"))
print(a.keys())
for key in a.keys():
    print(key,a[key])
for value in a.values():
    print(value)'''

'''a=dict(name="李四",age=16,adress="阿拉斯加")
print(a.items())
for i,j in a.items():
    print(i,j)
a,b,c=(1,2,3)
print(a,b,c)
d,e,f="123"
print(d,e,f)'''

'''a=dict(name="李四",age=16,adress="阿拉斯加")
print(a.pop("name"))
print(a)
print(a.popitem())
print(a)

a="你好"*6
b="你好"+'北京'
print(a,b)'''

'''a={    "1":{"name":"张三","age":18,"adress":"北京"},
       "2":{"name":"张三","age":18,"adress":"北京"},
       "3":{"name":"李四","age":21,"adress":"上海"},
   }
for i,j in a.items():
    print(i,end=" ")
    for k,v in j.items():
        print(k,v,end=" ")
    print()'''


a={    "1":{"name":"张三","age":18,"adress":"北京"},
       "2":{"name":"张三","age":17,"adress":"北京"},
       "3":{"name":"李四","age":21,"adress":"上海"},
       "4":{"name":"刘五","age":20,"adress":"内蒙"}
   }
for j in a.values():
    if j["adress"]=='北京':
        j["house"]="10000"
print(a)
for k,v in a.items():
    print(k,v)

```