Python - Write To Beginning and End of Every Line in TXT

python text text-files readlines
Dustin picture Dustin · Oct 28, 2011 · Viewed 11.2k times · Source

I'm currently looking for a way to write to beginning and end of every line of a TXT file in Python. For example,

Current TXT document:

Jimmy
Was
Here

Write the 1st VALUE to the beginning of every line

111Jimmy
111Was
111Here

Write the 2nd VALUE to the end of every line

111Jimmy222
111Was222
111Here222

Can't seem to find anything on Google that describes how to properly have this done. I've found methods of writing to specific lines, but not all of them in this way. Any help is appreciated! Thanks!

Answer

Steven Rumbalski picture Steven Rumbalski · Oct 28, 2011 
prefix = '111'
suffix = '222'

with open('source.txt', 'r') as src:
    with open('dest.txt', 'w') as dest:
       for line in src:
           dest.write('%s%s%s\n' % (prefix, line.rstrip('\n'), suffix))

Related questions

Print string to text file

I'm using Python to open a text document: text_file = open("Output.txt", "w") text_file.write("Purchase Amount: " 'TotalAmount') text_file.close() I want to substitute the value of a string variable TotalAmount into the text document. Can someone …

Read More
How to read a text file into a list or an array with Python

I am trying to read the lines of a text file into a list or array in python. I just need to be able to individually access any item in the list or array after it is created. The text …

Read More
How to replace multiple substrings of a string?

I would like to use the .replace function to replace multiple strings. I currently have string.replace("condition1", "") but would like to have something like string.replace("condition1", "").replace("condition2", "text") although that does not feel like good syntax what …

Read More