Replace comma with a new line in a text file using Python

By Ankita Khan

In this tutorial, we will learn how to replace the comma with a new line in a text file in Python.

Before proceeding to the solution, let us learn about dealing with text files in python first with a simple example:

Python provides in-built methods for file handling operations, such as open, read, write and close. To,

1. Create a file, or open an existing file, use open(filename, mode) which returns a file handler.
2. Read a file, use the filehandler.read(size) method where size is optional and which returns the data read as a string.
3. Write to a file, use the filehandler.write(string) method which returns the number of characters written.
4. Close a file, use the filehandler.close() method.

There are also various file modes such as r, w, r+, w+, a, etc. out of which the r is the default mode.

Syntax to open and read the file contents:

>>> fhr=open('filename.txt','r') 
>>> data=fh.read()
>>> fhr.close()

Syntax to open and write to the file:

>>> fhw=open('file.txt','w')
>>> fhw.write("Hello \n")
>>> fhw.close()

Program to replace the comma with a new line in a text file in Python

f1=open("Desktop/file1.txt","r+")
input=f1.read()
print(input)
input=input.replace(',','\n')
print(input)
f2=open("Desktop/file1.txt","w+")
f2.write(input)
f1.close()
f2.close()

Output:

HI,BYE,GO
HI
BYE
GO
9

2 responses to “Replace comma with a new line in a text file using Python”

1. Nellie says:

   June 25, 2020 at 11:33 pm

   Thanks, this was perfect for what I needed

   Reply
2. David says:

   September 19, 2021 at 11:23 am

   I’m not sure that’ll be sufficient enough for what people searched for I understand you don’t have any say about what Google comes up with but at least you could tag it better… Just a suggestion! 😉

   Reply