What is b String in Python

Python b string consists of bytes data, meaning the literal representing integers is between 0 and 255. The main difference between Python b string and Python string is its data type. The normal string has a sequence of Unicode characters like UTF-16 or UTF-32, whereas the Python b string has bytes data type means the literals that represent integers between 0 and 255 (also known as octets).

By adding that prefix b in front of a normal python string, we modified its data type from string to bytes.

Example

app_string = 'Happiest Season'

print(type(app_string))

app_string_b = b'Happiest Season'

print(type(app_string_b))

Output

<class 'str'>
<class 'bytes'>

You can see that the first is a normal string, and the second has bytes.

The second object you are printing is not a string but rather a byte object as a byte literal.

The datatype is a Byte type object in Python 2.x, str, and bytes, but in Python 3.x, this is changed now.

That’s it.