有大佬可以解释一下这个代码吗？

Question

import random
import actions as Act

class Bot:
max_tower = 30
def init(self, player_id):
self.player_id = player_id

def inject_data(self, data):
    pass

def get_action(self, obs, bg = None, max_opt=3):
    # if self.player_id == 0:
    #     obs['player_info'][1]['lives'] = 100
    # print (obs['player_info'][1]['lives'])
    action_seq = []
    for i in range(max_opt):
        action_seq.append(self._get_random_action())
    return action_seq

def game_over(self, winner, obs):
    pass

def _get_random_action(self):
    d1 = random.choice(list(Act.Actions))
    if d1 == Act.Actions.NOOP:
        return Act.noop()
    elif d1 == Act.Actions.BUY_TOWER:
        type = random.randint(0, 1)
        slot = random.randint(0, self.max_tower)
        return Act.buy_tower(type, slot)
    elif d1 == Act.Actions.BUY_MONSTER:
        type = random.randint(0, 3)
        return Act.buy_monster(type)