''' Purpose: better understand parameter passing nuances
'''

def g( strings, s ) :

    n = len( strings )

    for i in range( 0, n ) :
        strings[ i ] = s


cities = [ 'Richmond', 'Blacksburg', 'Roanoke', 'Lynchburg', 'Norfolk' ]

g( cities, 'Cville' )

print( cities )