将字符串整数更改为int类型时出现Python错误！
你好！我正在编码一个数据库系统，并在文件内放置了一个数字10000，其中没有任何其他字符。然后，当我在代码中打开它并尝试将其更改为整数时，它给出了错误！ tkinter也发生了同样的事情。
name = input("What is the name of the item? > ")
model = input("What is the model of the item? > ")
cob = input("How much buying it cost? > ")
db.inventory(name, model, cob)
overall_read = open("overall", "r")
overall_write = open("overall", "w")
overall_read_read = overall_read.read()
overall_new_int = int(overall_read_read)
cob_int = int(cob)
overall_new = overall_new_int - cob_int
overall_write.write(str(overall_new))
main()
应更改为10000的整数！