生成txt文件：
mesg = "hello world"
with open("test.txt", "w") as f:
f.write("{}".format(mesg))
print("加载完成！")
生成json文件：
import json
mesg = {"key": "value"}
with open("test.json", "w") as f:
json.dump(mesg, f)
print("加载完成！")
生成csv文件：
import csv
with open("test.csv", "w") as f:
fieldnames = ["nam
