Python string replace method explanation with example

Python string replace method explanation with example:

replace is an important method defined in the string class. We can use this method to replace sub-string in a given string. This method returns a new string by replacing all occurrences of a given string by a different string.

In this post, we will learn how to use string replace with example.

replace method syntax:

Below is the syntax of replace:

given_str.replace(old_str, new_str[, count])

given_str is the original string.
old_str is the substring that we want to replace in given_str.
new_str is the new substring that we want to replace old_str with.
count is the number of replacements we need. This is an optional value. If the value of count is not given, it replaces all old_str with new_str.

This method creates a new string and returns that.

Example of replace:

Let’s take an example on how to use replace.

given_str = 'hello world hello world hello world'

new_str = given_str.replace('hello', 'world')

print(new_str)

Here, given_str is the given string and we are using replace on this string to replace all hello with world.

If you run this program, it will print the below output:

world world world world world world

replace with count:

Let’s use the last variable count to limit the replacement.

given_str = 'hello world hello world hello world'

new_str = given_str.replace('hello', 'world', 1)

print(new_str)

Here, we are passing 1 for count. So, it is replacing only the first hello with world. If you run this program, it will print the below output:

world world hello world hello world

As you can see here, it is replacing only the first hello word with world.

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Python string replace method explanation with example