Generating username using python

Question

I am attending a beginner course and I am very new to programming. I need to know of a function which generates a username using the first letter of someone's name, the first three letters of a person's surname and a 3 digit number without spaces. So far I have this:

full_name = input("Please enter your name: ")
first_letter = full_name[0]
space_index = full_name.find(" ")
three_letters_surname = full_name[space_index + 1:space_index + 4]
number = random.randrange (1,999)
username = (first_letter, three_letters_surname, number)
print = (username)

The output I get is from using a name like John Wayne is:

"J", "Way", 14

What I want to know is how to change my code so I get something like:

jway014

username = "".join([first_letter, three_letters_surname, str(number)]) — zondo
– zondo, Commented Mar 12, 2016 at 23:45

mhawke · Accepted Answer · 2016-03-13 00:18:10Z

You might be better off using split() to break the user's name into parts and then extracting from there. This will let you check that the user has entered at least a two word name, and you can also handle the case that someone enters one or more middle names or initials:

full_name = input("Please enter your name: ").lower().split()
if len(full_name) > 1:
    first_letter = full_name[0][0]
    three_letters_surname = full_name[-1][:3].rjust(3, 'x')
    number = '{:03d}'.format(random.randrange (1,999))
    username = '{}{}{}'.format(first_letter, three_letters_surname, number)
    print(username)
else:
    print('Error. Please enter first name and surname')
    # try again...

Should a surname be less than 2 characters long (not uncommon), the name is left padded with x characters.

Some examples:

Input            Output
John Wayne       jway014
J J Cool         jcoo777
L Ron Hubbard    lron666
Bob Lo           bxlo001

tjohnson · Accepted Answer · 2016-03-13 01:55:12Z

3

Try this

 import random
 import sys

 names = input("Please enter your name: ").split(" ")
 if not (len(names) > 1):
     print("Please input your full and last name.")
     sys.exit()
 first_letter = names[0][0]
 three_letters_surname = names[-1][:3]
 number = '{:03d}'.format(random.randrange(1, 999))
 username = (first_letter + three_letters_surname + number)
 print(username)

edited Mar 13, 2016 at 1:55

tjohnson

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answered Mar 12, 2016 at 23:49

Bernardo Meurer

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8 Comments

mhawke Over a year ago

What if user enters "L Ron Hubbard"? Or just plain old "Bob"?

mhawke Over a year ago

Also, what if the random number is < 100?

Bernardo Meurer Over a year ago

@mhawke Nice corrections, just edited to cover those cases, let me know what you think?

mhawke Over a year ago

There are still bugs in this answer. What if user entered "A A Milne"?

Bernardo Meurer Over a year ago

@mhawke Fixed by referring to the last index

|

Montegasppα Cacilhας · Accepted Answer · 2016-03-13 02:18:49Z

0

Replace this line:

username = (first_letter, three_letters_surname, number)

With this:

username = '{}{}{:03d}'.format(first_letter.lower(),
                               three_letters_surname.lower(),
                               number)

answered Mar 13, 2016 at 2:18

Montegasppα Cacilhας

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Comments

ml-moron · Accepted Answer · 2016-03-13 03:12:29Z

0

What about this:

import random

full_name = input("Please enter your name: ")
names = full_name.split(" ")
if (len(names) <= 1):
     print("Please input your full name")
     exit() 
first_letter = names[0][0]
three_letters_surname = names[1][0:3]
number = '{:03d}'.format(random.randrange (1,999))
username = "".join([first_letter, three_letters_surname, str(number)])
print(username)

edited Mar 13, 2016 at 3:12

answered Mar 12, 2016 at 23:52

ml-moron

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1 Comment

mhawke Over a year ago

number can be less than 100 - which will not produce a 3 digit string.

Mobin Pour Nowrouz · Accepted Answer · 2022-08-18 03:41:42Z

0

import random import sys

 names = input("Mobin: ").split(" ")
 if not (len(names) > 1):
     print("Pour Nowrouz .")
     sys.exit()
 first_letter = names[m][0]
 three_letters_surname = names[our][:3]
 number = 7'{:03d}'.format(random.randrange(1, 999))
 username = (first_letter + three_letters_surname + number)
 print(username)

answered Aug 18, 2022 at 3:41

Mobin Pour Nowrouz

1

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