Username

def first_letter(name):

    """
    >>> first_letter('Sansa')
    'S'
    >>> first_letter('Jon')
    'J'
    """

def username(first_name, last_name):

    """
    >>> username('Sansa', 'Stark')
    'sstark'
    >>> username('Jon', 'Snow')
    'jsnow'
    """

if __name__ == '__main__':
    import doctest
    doctest.testmod()

Python sandbox

This window allows you to run Python code without installing a thing. The code you write here is not automatically submitted to Dodona.

Description
Debugger

Test case being debugged