Code

Robot Rumble ALPHA
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import random

def closest_unit_by_team(state, unit, team=None):
    if team is None: team = state.other_team
        
    return tuple(sorted(state.objs_by_team(team), key=lambda obj: unit.coords.distance_to(unit.coords)))[0]

random_direction = lambda: random.choice([
        Direction.North,
        Direction.East,
        Direction.South,
        Direction.West])


directions = {}

dir_of = lambda unit: directions.get(unit.id, random_direction())


def robot(state, unit):
    
    if state.turn == 0: directions[unit.id] = random_direction()
    
    if state.turn % 4:
        return Action.move(dir_of(unit))
    else:
        self_dir = dir_of(unit)
        
        directions[unit.id] = [self_dir.rotate_cw, self_dir.rotate_ccw][int(unit.id)%2]
        
        return Action.attack(unit.coords.direction_to(closest_unit_by_team(state,unit).coords))