如何将key 1的值添加到字典中的另一个key中来构建数组？

# 定义字典
my_dict = {"key1": "value1", "key2": "value2"}

# 获取key 1的值
key1_value = my_dict["key1"]

# 获取key 2的值
key2_value = my_dict["key2"]

# 将key 1的值添加到key 2的值中
if isinstance(key2_value, list):
    key2_value.append(key1_value)
elif isinstance(key2_value, str):
    key2_value += key1_value

# 更新字典中key 2的值
my_dict["key2"] = key2_value

print(my_dict)

{"key1": "value1", "key2": "value2value1"}