[Tutor] Copying one text file into another

[Alan Gauld]

This sounds like it could be homework so I'll suggest a method but not
show you any code.

If it doesn't work show us ypiur code and we will try to help.


On 03/08/2021 19:55, Ed Connell wrote:
> Suppose you have two text files, A.txt and B.txt.  You want to copy A into
> B at some designated place .Of course there is copy and paste, but I got
> interested in how you could do this with Python. Can you help?

Assume File A:

A1
A2
A3
A4


And file B

B1
B2
B3

So you want to insert B into A after line A2.

open A.txt for reading
open OUT.txt for writing
for each line in A
     write line to OUT.txt.
     if line is A2:
         open B.txt for reading
         for each line in B
             write line to OUT.txt
         close B.txt
close A.txt
close OUT.txt
rename A.txt to A.bak   (or just delete it if you feel brave!)
rename OUT.txt to A.TXT  

Try that in Python.


-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos