code: def pick(dct, *keys):
      
      copy = dict()
      for key in keys:
          if key in dct.keys():
              copy[key] = dct[key]
      return copy
docs: Returns a copy of the dictionary filtered to only have values for the
          whitelisted keys (or list of valid keys)
  
          >>> pick({"name": "moe", "age": 50, "userid": "moe1"}, "name", "age")
          {'age': 50, 'name': 'moe'}