# name.py
# Walker M. White (wmw2), Anne Bracy (awb93)
# Feburary 11, 2018
"""Module with a single, non-working function.

The function in this module has a bug (in the sense that it does not satisfy
its specification). This allows us to show off debugging."""

def last_name_first(full_name):
    """Returns: copy of full_name in the form 'last-name, first-name'
    
    full_name: has the form <first-name> <last-name>
    with one or more blanks between the two names"""
    
    space_index = full_name.find(' ')   
    first = full_name[:space_index]  
    last = full_name[space_index+1:]
    return last+', '+first