PYTHON提取TXT或log内容

import os
import re
import tkinter as tk
from tkinter import filedialog

root = tk.Tk()
root.withdraw()

Files_r = filedialog.askopenfilenames(title="选择要转换历史告警log文件",filetypes=[('log、TXT文件', '*.log;*.txt')])  # 获得选择好的文件
if not Files_r:
    print("没有选中文件夹，请重新选择！")
else:
    Files_t=filedialog.asksaveasfilename(title="提取结果另存为：", filetype=[('csv文件', '*.csv')])
    if not Files_t:
        print("没有选择并输入要保存的文件名，请重新选择！")
    else:
        linenum=0
        with open(Files_t+".csv",'w') as r_f:
            r_f.write("ip"+chr(44)+"Timestamp"+chr(44)+"S Problem "+chr(44)+"MO (Cause)"+chr(44)+"name"+'n')
            r_f.closed
        for j in Files_r:

            with open(j) as f:
                file1 = f.readlines()

                linenum = -1
                st=0
                end=0
                for line in file1:
                    linenum = linenum + 1
                    if line.find('> q')>-1:
                        end=linenum
                    if line.find('Timestamp')>-1:
                        st=linenum


                if st>0:

                    x=0
                    y=0
                    for i in range(st,end):
                        if  file1[i].find('Timestamp')>-1:
                            x = file1[i].find('S Problem')
                            y=file1[i].find('MO (Cause')
                        if file1[i].find('Timestamp')==-1 and  file1[i].find('==')==-1 and  file1[i].count('n')!=len(file1[i]):
                            t1=(file1[i][0:x])
                            t2=(file1[i][x:y])
                            t3=(file1[i][y:len(file1[i])]).replace(","," ").strip()
                            #rr=re.compile(r"EUtranCellTDD=(w+-w+-d+)|EUtranCellFDD=(+w+-w+-d+)")
                            name_t3=t3.split(" ")[0]
                            t4=name_t3.replace("EUtranCellTDD=","").replace("EUtranCellFDD=","").strip('n')
                            
                            with open(Files_t+'.csv','a') as r_f:
                                r_f.write(str(j)+chr(44)+chr(34)+t1+chr(34)+chr(44)+t2+chr(44)+chr(34)+t3+chr(34)+chr(44)+t4+"n")
                    print(str(j)+" is done！")
        print("All is done！")