askopenfilename

import re

import os

import tkinter

root = tkinter.Tk()

ifile = tkinter.filedialog.askopenfilename(filetypes = [('TXT', 'txt')])

root.destroy()

ofile = ifile + 'out.txt'

if os.path.exists(ofile):

    print(ofile + '已存在，請刪除後再運行')

    exit(0)

pattern = '(\w+) (\w+).*?本月剩餘流量([\d.]+)MB'

ans = []

class T:

    def __init__(self, num, line):

        self.num = num

        self.line = line

    num = 0.0

    line = ''

with open(ifile, 'r') as f:

    while True:

        line = f.readline()

        if len(line) == 0:

            break

        a = re.match(pattern, line)

        ans.append(T(float(a.group(3)), a.group(1) + ' ' + a.group(2) + ' 剩餘流量:' + a.group(3) + 'MB'))

ans.sort(key = lambda a: a.num)

ans.reverse()

for i in ans:

    print(i.line)

#with open(ofile, 'a') as f:

    #for i in ans:

     #   f.write(i.line + '\n')

print('success')