在字典中间插入项目

def insert_item_in_dict(dictionary, item):
    keys = list(dictionary.keys())
    middle_index = len(keys) // 2

    keys.insert(middle_index, item)

    new_dict = {}
    for key in keys:
        new_dict[key] = dictionary[key]

    return new_dict

# 示例字典
my_dict = {
    "键1": "值1",
    "键2": "值2",
    "键3": "值3",
    "键4": "值4"
}

# 要插入的项目
new_item = "项目A"

# 在字典中间插入项目
new_dict = insert_item_in_dict(my_dict, new_item)

# 打印插入后的字典
print(new_dict)