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<PlayerObject>.set_name(command.get_arg_string())

<Player object>.name = command.get_arg_string()

from commands.say import SayCommand
from players.entity import Player

@SayCommand('name')
def change_name(command, index, team_only):
    new_name = command.get_arg_string()
    if new_name:
        Player(index).name = new_name
    else:
        print('no name given...')

from messages import SayText2
from commands.say import SayCommand
from commands.say import SayFilter
from players.entity import Player
from events import Event
from filters.players import PlayerIter

player_names = {}

@Event('player_activate')
def _player_activate(event):
	userid = event.get_int('userid')
	player_names[userid] = 0


@SayCommand('name')
def change_name(command, index, team_only):
    new_name = command.get_arg_string()
    if new_name:
        player = Player(index)
        player.name = new_name
        player_names[player.userid] = new_name
    else:
        SayText2('\x05You need to add a name after the \x04name saycommand').send(index)
		
@SayFilter
def _say_command_hook(command, index, team=None):
    player = Player(index)
    if not player.userid in player_names:
        player_names[player.userid] = 0
    if player_names[player.userid] != 0:
        message = command.get_command_string()
        for player_ent in PlayerIter():
            SayText2('%s: %s' % (player_names[player.userid], message)).send(player_ent.index)
        return False

@Event('player_changename')
def player_changename(GameEvent):
    return EventAction.STOP_BROADCAST

SayText2('\x03{0}\x01: {1}'.format(player_names[player.userid], message), index).send()