old_contents: from pymongo import MongoClient
  
  
  class dbi():
      def __init__(self, uri, db_name):
          self.__client = MongoClient(uri)
          self.__db = self.__client[db_name]
  
      def find_uri(self, uri_id):
          db_uri = self.__db.uri
          ret = list(db_uri.find({'id': uri_id}))
          print(ret)
          if len(ret) == 1:
              return ret[0]['uri']
          else:
              return None
  
      def find_id(self, uri):
          db_uri = self.__db.uri
          ret = list(
              db_uri.find({'uri': uri}))
          if len(ret) == 1:
              return int(ret[0]['id'])
          else:
              return None
  
      def update(self, uri):
          uri_id = self.find_id(uri)
          if uri_id is not None:
              return uri_id
          else:
              db_cs = self.__db.counters
              ret = db_cs.find_and_modify({'id': 'uri_id'}, {'$inc': {'seq': 1}})
              uri_id = ret['seq']
              db_uri = self.__db.uri
              if self.find_uri(uri_id) is None:
                  db_uri.insert_one({'id': uri_id, 'uri': uri})
                  return uri_id
              else:  # pragma: no cover
                  raise Exception()
  
new_contents: from pymongo import MongoClient
  
  
  class dbi():
      def __init__(self, uri, db_name):
          self.__client = MongoClient(uri)
          self.__db = self.__client[db_name]
  
      def find_uri(self, uri_id):
          db_uri = self.__db.uri
          ret = list(db_uri.find({'id': uri_id}))
          if len(ret) == 1:
              return ret[0]['uri']
          else:
              return None
  
      def find_id(self, uri):
          db_uri = self.__db.uri
          ret = list(
              db_uri.find({'uri': uri}))
          if len(ret) == 1:
              return int(ret[0]['id'])
          else:
              return None
  
      def update(self, uri):
          uri_id = self.find_id(uri)
          if uri_id is not None:
              return uri_id
          else:
              db_cs = self.__db.counters
              ret = db_cs.find_and_modify({'id': 'uri_id'}, {'$inc': {'seq': 1}})
              uri_id = ret['seq']
              db_uri = self.__db.uri
              if self.find_uri(uri_id) is None:
                  db_uri.insert_one({'id': uri_id, 'uri': uri})
                  return uri_id
              else:  # pragma: no cover
                  raise Exception()
  
subject: Revert "printデバッグ"