In Python3, ascii_letters is a pre-initialized string used as string constant.
ascii_letters is basically concatenation of ascii_lowercase and ascii_uppercase string constants. Also, the value generated is not locale-dependent, hence, doesn’t change.
Syntax :
string.ascii_letters
Note : Make sure to import string library function inorder to use ascii_letters.
Parameters :
Doesn't take any parameter, since it's not a function.
Returns :
Return all ASCII letters (both lower and upper case)
Code #1 :
# import string library functionimport string # Storing the value in variable resultresult = string.ascii_letters # Printing the valueprint(result) |
Output :
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
Code #2 :
Given code checks if the string input has only ASCII characters or not.
# importing string library functionimport string # Function checks if input string# has only ascii letters or notdef check(value): for letter in value: # If anything other than ascii # letter is present, then return # False, else return True if letter not in string.ascii_letters: return False return True # Driver Codeinput1 = "GeeksForGeeks"print(input1, "--> ", check(input1)) input2 = "Geeks for Geeks"print(input2, "--> ", check(input2)) input3 = "Geeks_for_Lazyroar"print(input3, "--> ", check(input3)) |
Output :
GeeksForGeeks --> True Geeks for Geeks --> False Geeks_for_Lazyroar --> False
Applications :
The string constant ascii_letters can be used in many practical applications.
Let’s see a code explaining how to use ascii_letters to generate strong random passwords of given size.
Code #1 :
# Importing random to generate# random string sequenceimport random # Importing string library functionimport string def rand_pass(size): # Takes random choices from # ascii_letters and digits generate_pass = ''.join([random.choice( string.ascii_letters + string.digits) for n in range(size)]) return generate_pass # Driver Code password = rand_pass(10)print(password) |
Output :
oQjI5MOXQ3
Note : Above given code will print random (different) password everytime, for the size provided.
Code #2 :
Say if you want to generate random password, but from the set of given string. Let’s see how can we do this using ascii_letters :
# Importing random to generate# random string sequenceimport random # Importing string library functionimport string def rand_pass(size, scope = string.ascii_letters + string.digits): # Takes random choices from ascii_letters and digits generate_pass = ''.join([random.choice(scope) for n in range(size)]) return generate_pass # Driver Code password = rand_pass(10, 'Geeks3F0rgeeKs')print(password) |
Output :
kg3g03keG3
