Like many Python developers, you’re probably familiar with the string interpolation syntax. Python String interpolation is a technique of inserting or replacing variables in a string using placeholders. It lets you insert values into a string directly, making it easy to format and display text.
This is a handy tool that can be used to generate text in a variety of ways. Understanding string interpolation in python allows you to create more versatile and readable code. This article will show you how to use string interpolation to manipulate strings in variables. So if you’re looking to improve your Python skills, read on.
Table of Contents
What is String Interpolation?
In Python, string interpolation is the process of inserting or replacing a value into a placeholder, a placeholder that holds your value/data. It allows you to format the output in a more sophisticated manner dynamically. For instance, let us say you have the following string:
“John is a man.”
You can interpolate the string to make it
“John is an awesome guy.”
Methods of Python String Interpolation
String Interpolation in Python is used to interpolate values between two strings. Several methods help you to replace text chunks in one string with the value found at a particular location within another string.
following are the four methods of interpolation of string discussed in detail with code example:
- f-string
- %-formatting
- format
- template string
f-string
Python F-string or literal string interpolation were introduced by python 3.6 to make string interpolation easier. You may format strings the same way as you might with the str.format(). For formatting, F-strings offer a simple and convenient way to embed python code inside string literals. The string is initialized with “f” as a prefix in Python f-string.
a = 'welcome'
b = 'codeleaks'
print(f"{a} to {b}") Output
Learn more in detail about , Python F-strings.
%formatting
%formatting is a built-in function, the most common and straightforward method for string formatting can be accessed by % (modulo) but is not as flexible as other methods.
a = 'codeleaks'
b ='python'
print('welcome to %s! learn %s.'%(a,b)) Output
str.format()
The str.format() is a string formatting mechanism and is used to format a string according to the provided arguments and the placeholders defined by a pair of curly braces { } into a string. These arguments are usually expressions that define how the values should be formatted.
a = 'codeleaks'
b ='python'
print('welcome to {a}! learn {b}'.format(a=a,b=b)) Output
Template strings
Template string method of string interpolation in python is a way to initialize and generate strings using template variables. It is a lengthy and complicated method of interpolation string.
from string import Template
n1 = 'Hello'
n2 = 'python'
n = Template(' codeleaks fam $n3 ! learn $n4.')
print(n.substitute(n3=n1, n4=n2)) Output
FAQs
What is the purpose of string interpolation?
The process of replacing placeholders with their corresponding values is known as string interpolation. It is used to evaluate a string literal containing one or more placeholders.
What is string interpolation better known as?
Variable substitution, variable interpolation, and variable expansion are all terms used to describe String Interpolation. It’s a technique of replacing placeholders in string literals with corresponding values after they’ve been evaluated.
What is the difference between string interpolation and concatenation?
String interpolation is used to substitute or add values into variables. While concatenation may combine two strings.
Conclusion
This article discussed Python String Interpolation and how it can help you write more sophisticated code. Be it a simple string or a long one, and you can now type and use the new interpolation syntax to create beautiful and elegant outputs. Just put your creativity to good use and enjoy how easy it is to use this powerful tool in Python. Happy Coding.
