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Python string | ascii_uppercase

Last Updated : 08 Feb, 2024
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In Python3, ascii_uppercase is a pre-initialized string used as a string constant. In Python, the string ascii_uppercase will give the uppercase letters ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ’.

Syntax : string.ascii_uppercase Parameters: Doesn’t take any parameter, since it’s not a function. Returns: Return all uppercase letters.

Note: Make sure to import the string library function to use ascii_lowercase.

Code #1 :

Python3




# import string library function
import string
   
# Storing the value in variable result
result = string.ascii_uppercase
   
# Printing the value
print(result) 






                        










Output :


ABCDEFGHIJKLMNOPQRSTUVWXYZ


Code #2 :


 Given code checks if the string input has only upper ASCII characters. 




Python3














                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# importing string library function 


import string 


    


# Function checks if input string 


# has upper ascii letters or not 


def check(value): 


    for letter in value: 


            


        # If anything other than upper ascii 


        # letter is present, then return 


        # False, else return True 


        if letter not in string.ascii_uppercase: 


            return False


    return True


    


# Driver Code 


input1 = "GeeksForGeeks"


print(input1, "--> ",  check(input1)) 


    


input2 = "GEEKS FOR GEEKS"


print(input2, "--> ", check(input2)) 


    


input3 = "GEEKSFORGEEKS"


print(input3, "--> ", check(input3)) 



















                        







                        










Output:


GeeksForGeeks -->  False
GEEKS FOR GEEKS -->  False
GEEKSFORGEEKS -->  True


Applications : The string constant ascii_uppercase can be used in many practical applications. Let’s see a code explaining how to use ascii_uppercase to generate strong random passwords of given size.




Python3














                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Importing random to generate 


# random string sequence 


import random 


   


# Importing string library function 


import string 


   


def rand_pass(size): 


       


    # Takes random choices from 


    # ascii_letters and digits 


    generate_pass = ''.join([random.choice( 


                        string.ascii_uppercase + string.digits) 


                        for n in range(size)]) 


                           


    return generate_pass 


   


# Driver Code  


password = rand_pass(10) 


print(password) 


     



















                        







                        










Output:


TR2ESZAJOT




                                    


                                                                        

                                        

                                            

                                                

                                                    
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                                                    Shivam_k                                                

                                            

                                            

            
                                        

                                        

                                            
    

        
        
    
                                            

                                                
                                                
                                            

                                            

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