docs: def _generate_manager(manager_config):
          '''
          Generate a manager from a manager_config dictionary
  
          Parameters
          ----------
  
          manager_config : dict
              Configuration with keys class, args, and kwargs
              used to generate a new datafs.manager object
  
          Returns
          -------
  
          manager : object
              datafs.managers.MongoDBManager or
              datafs.managers.DynamoDBManager object
              initialized with *args, **kwargs
  
          Examples
          --------
  
          Generate a dynamo manager:
  
          .. code-block:: python
  
          >>> mgr = APIConstructor._generate_manager({
          ...     'class': 'DynamoDBManager',
          ...     'kwargs': {
          ...         'table_name': 'data-from-yaml',
          ...         'session_args': {
          ...             'aws_access_key_id': "access-key-id-of-your-choice",
          ...             'aws_secret_access_key': "secret-key-of-your-choice"},
          ...         'resource_args': {
          ...             'endpoint_url':'http://localhost:8000/',
          ...             'region_name':'us-east-1'}
          ...     }
          ... })
          >>>
          >>> from datafs.managers.manager_dynamo import DynamoDBManager
          >>> assert isinstance(mgr, DynamoDBManager)
          >>>
          >>> 'data-from-yaml' in mgr.table_names
          False
          >>> mgr.create_archive_table('data-from-yaml')
          >>> 'data-from-yaml' in mgr.table_names
          True
          >>> mgr.delete_table('data-from-yaml')
  
          '''
  
          if 'class' not in manager_config:
              raise ValueError(
                  'Manager not fully specified. Give '
                  '"class:manager_name", e.g. "class:MongoDBManager".')
  
          mgr_class_name = manager_config['class']
  
          if mgr_class_name.lower()[:5] == 'mongo':
              from datafs.managers.manager_mongo import (
                  MongoDBManager as mgr_class)
  
          elif mgr_class_name.lower()[:6] == 'dynamo':
              from datafs.managers.manager_dynamo import (
                  DynamoDBManager as mgr_class)
  
          else:
              raise KeyError(
                  'Manager class "{}" not recognized. Choose from {}'.format(
                      mgr_class_name, 'MongoDBManager or DynamoDBManager'))
  
          manager = mgr_class(
              *manager_config.get('args', []),
              **manager_config.get('kwargs', {}))
  
          return manager