What is b String in Python?

Byte’s data make up the Python b string, which implies the literal that represents integers is between 0 and 255. The data type of Python b string and Python string differs significantly. The bytes data type literals in the Python b string represent values between 0 and 255, whereas the traditional string contains a sequence of Unicode characters such as UTF-16 or UTF-32. In Python, strings are used to represent text-based data and are contained in single or double-quotes. An instance of a string is as:

# my_str = “This is a sample string”

Strings represent data that humans can read, such as letters, special characters, words, or nearly anything else, whereas Bytes are used to represent low-level binary data structures. Both the str and bytes data types in Python 2.x is Byte type objects, but this has changed in Python 3.x. Bytes and string differ primarily because bytes are machine-readable, whereas the string is human-readable, and text is eventually translated into bytes for processing.

By appending the prefix b to a python regular string, the data type was changed from string to bytes. Strings can be converted to bytes, known as encoding, while the conversion of bytes to string is called decoding. To understand this concept better, let’s discuss some examples.

Example 1:

Bytes refers to literals representing values between 0 and 255, whereas str refers to literals comprising a series of Unicode characters (encoded in UTF-16 or UTF-32, depending on Python compilation). We changed the data type of a standard string from string to bytes by attaching the prefix b to it. Suppose you have two strings str_one = ‘Alex’ and string_two = b‘Alexa’

What do you think? Are these two similar or different? The distinction is in the data type. Let’s have a look at the types of both string variables.

str_one = 'Alex'


str_two = b'Alexa'


When the above-mentioned code is run, the following output is produced.

Example 2:

A procedure called encoding is used to convert strings to bytes. A procedure known as decoding can be used to convert bytes to strings. Consider the following example:

The decode() method will be used in this example. The function converts from the encrypting scheme used to encrypt the argument string to the encoding scheme used to encode the argument string to the chosen encrypting scheme. This has the exact opposite effect as encode. Let’s look at an illustration and understand how this function works.

my_str = b'Decoration'

print('\n\n Input:')



result = my_str.decode()

print('\n\n Output:')



The output of the above-mentioned code will look something like this.

To begin, we have stored an input string with the value ‘Decoration’ in the variable my_str. The data type of the string, as well as the input string, were then presented. The decode() function was then used, and the output was saved in the result variable. Finally, we have written the string in the result variable and the variable’s data type. As a result, the ending may be seen.

Example 3:

In our third example, we have converted strings to bytes. First, we printed a word in the below code. This string has a length of 2. Because this is a string was encoded using the encode() function in the next line, yielding the result b’\xc3\x961′. The encoded string given below is 3 bytes long, as indicated by the third line of code.




Here is the output after we have executed the program.


Now you know the concept of a b string in Python and how to convert bytes to strings and vice versa in Python in this article. We have gone over a detailed example for converting bytes to strings and string to bytes. All of the methods are well explained with examples.

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Kalsoom Bibi

Hello, I am a freelance writer and usually write for Linux and other technology related content