如何在循环添加的文件中打印特定行？

Question

from itertools import zip_longest 
f = open("all_info.txt", "a")
with open("all_info.txt") as f, open ("over_speeding.txt") as f1, open("fine.txt") as fine, open("all details.txt", "a") as everything:
     for fline, fineline in zip_longest (f, fine, fillvalue=""): 
          everything.write (fineline.strip() + "   ---   " + fline.strip() + "\n")      


          a = open("all details.txt", "r")
          for line in everything:#the problem
               everything.strip()
               if line in f1:
                    with ("fine1.txt", "a") as fine1:
                         fine1.write(line)

This is just a part of my whole code. My whole code takes vehicle registration number then checks if it is standard or not. then time taken to travel 1 mile is entered which is used to calculate the speed.

if the speed is greater than 70mph the registration number and the speed the vehicle was travelling goes to the file over_speeding.txt. then the other conditions determine which file does the details go (but this is not important).

The code that i have shown you will open 4 files, where the fine.txt file is already set and the over_speeding.txt files gets its data from my whole code. all_info.txt file will store all the inputs from my whole code then using the zip_lingest module all_info.txt file is appended with fine.txt to all_details.txt file.

what i want just to select the lines in all details.txt that are overspeeding, then save it to fine1.txt

eg fine.txt

11111
22222
33333
44444

all_info.txt

xxxxxxxx
dddddddd
aaaaaaaa
cccccccc

all_details.txt

11111 --- xxxxxxxx
22222 --- dddddddd
33333 --- aaaaaaaa
44444 --- cccccccc

if

xxxxxxx 

and

aaaaaaa 

were from the file over_speeding.txt, then in the all details.txt file:

11111 --- xxxxxxxx
33333 --- aaaaaaaa

should be saved into fine1.txt file

Answer 1

I had problems understanding your code (the names for variables are not really helpful, when someone tries to read your code, at least for me), but I've tried to rewrite it doing what you expected it to do:

from itertools import zip_longest
#EDIT why open all_info.txt twice?
#f = open("all_info.txt", "a")
with open("all_info.txt", "a") as f,\
    open("over_speeding.txt") as f1,\
    open("fine.txt") as fine,\
    open("all details.txt", "a") as everything,\
    open("fine1.txt", "a") as fine1: # moved opening fine1 here

    for fline, fineline in zip_longest(f, fine, fillvalue=""):
        #EDIT
        line_to_write = fineline.strip() + "   ---   " + fline.strip() # so we don't need to write it twice
        everything.write(line_to_write + "\n") # write to file with newline
        if line_to_write in f1: # compare the line with values in over_speeding
            fine1.write(line_to_write)

As it is only part of a script and I don't have all the data I could not test it. Your approach: write all the lines to everything and then check all the lines separately. My approach: get the line, write it and check it in the same loop. If I understood your code, it should do the same. Please ask or point to any mistakes/misunderstandings.