无法使用pop - Bug重命名Python字典键值？

def rename_key(dictionary, old_key, new_key):
    if old_key in dictionary:
        dictionary[new_key] = dictionary.pop(old_key)
    return dictionary

# 示例用法
my_dict = {'name': 'John', 'age': 25, 'city': 'New York'}
print("原始字典:", my_dict)

my_dict = rename_key(my_dict, 'name', 'full_name')
print("重命名后的字典:", my_dict)