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How to replace the python string that save you 18 seconds?

Replace python string

Mini Introduction

A replacement has so much importance. You replace your home machine, your wearable clothes, your food and many other things.

Likewise, you can replace one string with another in python.

In python, you need a method to replace the strings.

So, which method you’ll use?

In this blog post, I’m going to show you the two methods of string replacement that saves you 18seconds to kill in python.

Also, to replace any part of the string, You don’t have to create a new string.

With the string replacement method you can do it in few seconds easily .

Thus, one method’s for python 3.x and another one’s for 2.x version.

Both give the same output but with different steps.

1st method for string replacement in Python 2.x

In python 2.x, you need to first import the string module.

Meanwhile, this module will import the methods of string.

All of the above, I’m going to show you the step by step code for string replacement.

  • First, you’ve to create a variable with a string value.
  • Likewise, you’ve to import the string module.
  • Also, the string.replace() will store inside your new variable. That means you’ve to create a new variable.

For example,

Python string replacement

When my above code run it gives the output—>

I love python 3.0.

Syntax of python string replacement

From the above code, you can see the syntax.

Syntax: new_string = string.replace(old_string, to_replace_str, into_replace_string,frequent_times).

Let’s see the parameters below:

  • old_string: A string who’s substring you’ve to change.
  • to_replace_str: It’s a substring you’ve to replace.
  • into_replace: The new substring of string.
  • frequent_times: It’s an optional parameters. That means how many times you’ve to replace particular string.

At the above code, you can see that I haven’t used the last (freaquent_times) parameter.

You’ve to give an integer value for the freaquent_times parameter.

Return value of string replacement—>Python

Firstly, the return value is a string with a new substring.

In the above example, you can see that the return value is I love python 3.0.

Also, you can see that 2.0 has been replaced with 3.0.

Thus the return value is a string with a new substring.

2nd method of string replacement using python 3.x

The 2nd method of string replacement is easier than 1st method.

This method will save your few seconds.

Because you don’t have to import the string module.

For example,

String replacement

Thus, you can see that you can directly apply replace() method to the old_string.

To clarify, you don’t need to import the string module.

It’s a little easier than 1st method. And saves your few seconds to kill.

However, the output of both methods are the same.

So, I suggest you use this method.

Syntax of this string replacement

Syntax of 2nd method is a little easier than the previous one.

Thus, from the above code you can see the syntax is new_string = old_string.replace(replaceable, into replace).

I’m going to explain each term to you:

  • new_string : The new_string which you’ve to display.
  • old_string : The string which you’ve to change.
  • replaceable: The substring of string which you’ve to change.
  • into_string : The new_substring which you want.

So, I’ve explained to you these four terms.

Therefore, I hope you understand these terms.

If you haven’t understood, comment on it. I’ll explain it in another way.

Ask to understand!!

Return value of string replacement

From example, you can see the return value is the same as 1st method.

Likewise, you can see that output is I love cat.

A dog has been replaced with a cat.

When to use which methode for string replacement?

The string replacement method is used when you want to find substrings from the large strings.

If you’re using python 2.0, you’ve to use 1st method.

Where you’ve to import a string module.

In opposite, you can use the 2nd method for python 3.x.

Here, you don’t need to import the string module.

Thus, 2nd method is a lot easier than 1st one. And it saves your few seconds.

From this difference, I suggest you use 1st one.


Finally, you’ve seen the Python string replacement method.

It saves your few seconds to kill.

The first method, string.replace() is used for python 2. x.

Here, you’ve to import the string module.

In opposite the 2nd method which is old_string.replace().

Where you don’t have to import the string module.

This approach is a little bit easier than 1st method.

At last, you can choose whichever method but remember 1st isn’t working on python 3.x.

Likewise, 2nd method isn’t working in python 2.x.

Thus, what do you think about it? Is anything you want to cover, I haven’t covered? Comment on it!!

Which method you’ll choose for python string replacement?

You can also check my other blog posts below. This blog posts covers the various python topics.

* The best way to Loop Using Python Enumerator in [2021]

* Here’s a fresh approach to format the string in Python 3.6: fstring

* Best Utimate new guide for python beginners in 2021

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