如何在python中的文件中写下面的结果/如何存储结果？

Question

制作了一个python GUI，现在我想将变量称为参考和总成本存储在一个文件中 我怎样才能做到这一点？

尝试过编写如下文件：

def writetofile():
    import os
    outputname ='tutorial.txt'
    a= "TotalCost"

    myfile = open(outputname,'w')
    myfile.write('File A value is    :  ' + str(a)  +   '\n')
    myfile.close()

    if os.stat(outputname).st_size > 0:
       print("tutorial.txt file has been populated")
    else:
       print("the output value is empty")
       print("The A value should read:     " +  str(a) +  '\n')

writetofile()

但只有文字来了，而不是TotalCost的计算值

Answer 1

a= "TotalCost"

这是一个字符串，而不是计算值。

试试这个

import os

def writetofile(total_cost):

    outputname ='tutorial.txt'
    a= total_cost   # this is a variable you're writing to the file

现在，进行GUI调用writetofile(TotalCost)