Remove Commas From String in Python

  1. Remove Commas From String Using the replace() Method in Python
  2. Remove Commas From String Using the re Package in Python

This tutorial explains how we can remove commas from a string using Python. To remove commas from a string in Python, we can use the replace() method or the re package.

We will use the string in the code snippet below to demonstrate how we can remove commas from a string in Python.

my_string="Delft, Stack, Netherlands"
print(my_string)

Output:

Delft, Stack, Netherlands

Remove Commas From String Using the replace() Method in Python

The replace() method in Python str class replaces a substring with the specified substring and returns the transformed string.

Syntax of replace() Method:

str.replace(old, new , count)

Parameters

old substring, which is to be replaced in the string str
new substring used to replace old substring in the string str
count optional parameter that specifies how many times old is replaced by new. If count is not provided, the method will replace all old substrings with new substring.

Return

String in which old substring is replaced by new substring.

Example: Remove Commas From String Using the str.replace() Method

my_string="Delft, Stack, Netherlands"
print("Original String is:")
print(my_string)

transformed_string=my_string.replace(",","")
print("Transformed String is:")
print(transformed_string)

Output:

Original String is:
Delft, Stack, Netherlands
Transformed String is:
Delft Stack Netherlands

It replaces all the commas in the string my_string with "". Hence, all the , in the string my_string are removed.

If we only wish to remove the first , in the my_string, we can do so by passing the count parameter in the replace() method.

my_string="Delft, Stack, Netherlands"
print("Original String is:")
print(my_string)

transformed_string=my_string.replace(",","",1)
print("Transformed String is:")
print(transformed_string)

Output:

Original String is:
Delft, Stack, Netherlands
Transformed String is:
Delft Stack, Netherlands

As the value of count is set to 1 in the replace() method, it only removes the first comma in the string my_string.

Remove Commas From String Using the re Package in Python

In the re pacakge of Python, we have sub() method, which can also be used to remove the commas from a string.

import re

my_string="Delft, Stack, Netherlands"
print("Original String is:")
print(my_string)

transformed_string=re.sub(",","",my_string)
print("Transformed String is:")
print(transformed_string)

Output:

Original String is:
Delft, Stack, Netherlands
Transformed String is:
Delft Stack Netherlands

It replaces all the , in the string my_string with "" and removes all the commas in the string my_string.

The first argument to the re.sub() method is substring to be replaced, the second argument is the substring to replace with, and the third argument is the string in which replacement is to be done.

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