import re

class Checker(object):

FIELD_LIST = {'name', 'age', 'birthday', 'origin_home', 'current_home'}

def check_add_fields_exists(self, dict_tobe_inserted):

if not dict_tobe_inserted:

return False

return self.FIELD_LIST == set(dict_tobe_inserted.keys())

def check_update_fields_exists(self, dict_tobe_inserted):

if 'people_id' not in dict_tobe_inserted:

return False

return self.check_add_fields_exists(dict_tobe_inserted.get('updated_info', {}))

def check_value_valid(self, dict_tobe_inserted):

name = dict_tobe_inserted['name']

if not name:

return '姓名不能为空'

age = dict_tobe_inserted['age']

if not isinstance(age, int) or age < 0 or age > 120:

return '年龄必需是范围在0到120之间的整数'

birthday = dict_tobe_inserted['birthday']

if not re.match('\d{4}-\d{2}-\d{2}', birthday):

return '生日格式必需为：yyyy-mm-dd'

def transfer_people_id(self, people_id):

if isinstance(people_id, int):

return people_id

try:

people_id = int(people_id)

return people_id

except ValueError:

return -1