Python，”；如果第一次调用line，请执行其他操作；

因此，这个标题是不言自明的，但我会更详细地介绍。我正在创建一个文本相关的游戏，我将拥有数百万个区域。每次你进入一个新的区域，你都会得到一种与你以后再次进入同一个地方时唯一不同的反应，我需要找到一种方法：

if len(line) == 1:
    do exclusive thing
else:
    do normal thing

当然，我可以使用像“a=0”这样的计数器系统，但是我需要为我创建的每个区域创建一个单独的计数器，我不希望这样。

您需要静态变量：

---

您可以只存储一个

dict

来跟踪房间访问情况，使用

defaultdict

from collections import defaultdict

#Using a defaultdict means any key will default to 0
room_visits = defaultdict(int)

#Lets pretend you had previously visited the hallway, kitchen, and bedroom once each
room_visits['hallway'] += 1
room_visits['kitchen'] += 1
room_visits['bedroom'] += 1

#Now you find yourself in the kitchen again
current_room = 'kitchen'
#current_room = 'basement' #<-- uncomment this to try going to the basement next

#This could be the new logic:
if room_visits[current_room] == 0: #first time visiting the current room
    print('It is my first time in the',current_room)
else:
    print('I have been in the',current_room,room_visits[current_room],'time(s) before')

room_visits[current_room] += 1 #<-- then increment visits to this room

从集合导入defaultdict
#使用defaultdict意味着任何键都将默认为0
房间访问量=默认DICT（int）
#让我们假设您之前曾访问过走廊、厨房和卧室，每次一次
房间访问次数['走廊]+=1
房间探访[“厨房”]+=1
房间访问次数['卧室]+=1
#现在你又在厨房里了
当前房间=‘厨房’
#当前房间=‘地下室’#在你的
房间
类上放置一个标志，指示它是否已经进入。如何进入？以及我的游戏的数据结构不同，它更像是一个故事模式的游戏。例如，在类上定义
访问=0
，并在你进入房间时增加它（
self.visions+=1
）。（使用计数器而不是旗帜可以给你很大的灵活性，如果你以后决定如果玩家去同一个房间十次，或者其他什么）谢谢！这真的帮了我的忙
from collections import defaultdict

#Using a defaultdict means any key will default to 0
room_visits = defaultdict(int)

#Lets pretend you had previously visited the hallway, kitchen, and bedroom once each
room_visits['hallway'] += 1
room_visits['kitchen'] += 1
room_visits['bedroom'] += 1

#Now you find yourself in the kitchen again
current_room = 'kitchen'
#current_room = 'basement' #<-- uncomment this to try going to the basement next

#This could be the new logic:
if room_visits[current_room] == 0: #first time visiting the current room
    print('It is my first time in the',current_room)
else:
    print('I have been in the',current_room,room_visits[current_room],'time(s) before')

room_visits[current_room] += 1 #<-- then increment visits to this room