For this example we need to import the string library.



In [1]:

    
import string

Our initial example will use the uppercase letters that are in the string library.



In [2]:

    
print(string.ascii_uppercase)









    



ABCDEFGHIJKLMNOPQRSTUVWXYZ

Here we will check to see if a letter is in the string.ascii_uppercase constant.



In [3]:

    
if 'b' in string.ascii_uppercase:
    print("Yes, the letter is in string.ascii_uppercase")
else:
    print("No, the string is not in string.ascii_uppercase")









    



No, the string is not in string.ascii_uppercase

Here are some other interesting constants in the string library.



In [4]:

    
print(string.ascii_lowercase)









    



abcdefghijklmnopqrstuvwxyz



In [5]:

    
print(string.whitespace)

The previous example (string.whitespace) isn't easy to demonstrate because it's made up of characters like a space, a tab, and a newline character.