如何更改字典中的每个键

def change_dict_keys(dictionary, prefix):
    new_dict = {}
    for key, value in dictionary.items():
        new_key = prefix + key  # 在原始键前添加前缀
        new_dict[new_key] = value
    return new_dict

my_dict = {'name': 'John', 'age': 25, 'city': 'New York'}
new_dict = change_dict_keys(my_dict, 'new_')
print(new_dict)

{'new_name': 'John', 'new_age': 25, 'new_city': 'New York'}