What is ascii_lowercase constant in Python?

The string module in Python

The string module in Python is a collection of different constants.

The ascii_lowercase constant

The ascii_lowercase constant in the string module contains the English alphabets from a to z, only in lowercase, as a string.

The value of the constant is as follows:

abcdefghijklmnopqrstuvwxyz

Syntax

string.ascii_lowercase

As ascii_lowercase is a constant, we can access it via the string module name.

Code example 1

Let’s look at the code below:

Code explanation

• Line 1: We import the string module.
• Line 3: We store the output of string. ascii_lowercase in the variable ascii_lowercase_output.
• Line 5 : We print ascii_lowercase_output.

Coding example 2

Let’s look at the code below:

Code explanation

• Line 1: We import the string module.
• Lines 3 to 9: We define a method called is_ascii_lowercase_only that accepts a string as parameters and checks whether the input string contains only lowercase ASCII letters or not.
• Line 11: We define a string called str_to_check_1 containing only ASCII lowercase letters.
• Line 12: We invoke the is_ascii_letters_only method, passing str_to_check_1 as a parameter.
• Line 14: We define a string called str_to_check_2 containing lowercase and uppercase ASCII letters and digits.
• Line 15: We invoke the is_ascii_letters_only method, passing str_to_check_2 as a parameter.