我试图退还两本字典。给person_to_friends和person_to_networks函数，而profile_file是文本文件。我写的是：
def load_profiles(profiles_file, person_to_friends, person_to_networks):
"""
(file, dict of {str : list of strs}, dict of {str : list of strs}) -> NoneType
Update person to friends and person to networks dictionaries to include
the data in open file.
"""
profiles_file = open('data.txt', 'r')
person_to_friends = person_to_friends(profiles_file)
person_to_networks = person_to_networks(profiles_file)
return person_to_friends, person_to_networks
这只给了我person_to_friends字典。.有人可以帮助解决这个问题吗？我要退货的是
{person_to_friends} {person_to_networks}