#取值import types
allGuests = {'Alice': {'apples': 5, 'pretzels': {'12':{'beijing':456}}},
  'Bob': {'ham sandwiches': 3, 'apple': 2},
  'Carol': {'cups': 3, 'apple pies': 1}}
def dictget(dict1,obj,default=None):
 for k,v in dict1.items():
 if k == obj:
  print(v)
 else:
  if type(v) is dict:
  re=dictget(v,obj)
  if re is not default:
   print(re)
dictget(allGuests,'beijing')

def bijiaodict(dict1,dict2):
 for k,v in dict1.items():
 for k2,v2 in dict2.items():
  if k==k2 and v==v2:
  print('dict1=dict2')
  else:
  print('dict1!=dict2')
dict1={'2':'6'}
dict2={2:{1:{1:8}}}
bijiaodict(dict1,dict2)

#coding: utf-8
import types

#获取字典中的objkey对应的值，适用于字典嵌套
#dict:字典
#objkey:目标key
#default:找不到时返回的默认值
def dict_get(dict, objkey, default):
  tmp = dict
  for k,v in tmp.items():
    if k == objkey:
      return v
    else:
      if type(v) is types.DictType:
        ret = dict_get(v, objkey, default)
        if ret is not default:
          return ret
  return default

#如
dicttest={"result":{"code":"110002","msg":"设备设备序列号或验证码错误"}}
ret=dict_get(dicttest, 'msg', None)
print(ret)