[英]How do I unload an instance of a class in python
我认为最好举个例子说明为什么我要这样做。 假设我有一个游戏。 有一些敌人是这些敌人,这些敌人正在运行一个职业(生命,武器等)。如果玩家杀死了一个敌人,我想从游戏中卸载该敌人的数据(移除该职业的敌人实例)去做这个?
编辑:
确定使用del没有帮助。 这是一个基本示例,想象obj1是一个敌人,并且在i = 10的想象力之后该敌人死亡。 我有删除obj的代码,但是仍调用obj1中的功能Update(),因为即使外壳程序将d打印为True,外壳程序仍会打印“ AAAAAAAAAAAA”
import threading
import time
import sched
#import Queue
#setting up some OneInstance Var's
starttime=time.time()
condition = threading.Condition()
lock = threading.Lock()
#This is the tick method for calling the update threads in the child classes (set at 20 Ticks/s)
#The tick is run in its own thread so it can not be interrupted
#The tick method is part of the Base module but not part of the base class As there needs to be ONLEY ONE INSTANCE of it
def Tick(cond):
while True:
with cond:
cond.notifyAll() #This clears the block on the threads evey 20th of a second
time.sleep(0.05 - ((time.time() - starttime) % 0.05)) #This is the 20th of a second part
tickThread=threading.Thread(name = 'ThreadTick', target=Tick, args=(condition,)) #This setsup the Tick in its own thread
tickThread.start()#This runs said thread
#BaseClass is the class All other classes inhearit from
class BaseClass(object):
def __init__(self, name):
global condition
global lock
self.name = name
t=threading.Thread(name = 'Thread'+self.name, target=self.UpdateHandler, args=(condition,lock,))
t.start()
def BaseClassType(self):
"""Returns a string of the childs type"""
pass
def UpdateHandler(self, cond, lock):
#this part handles when to call the update.
#it is allso needed so that it can be run in a thread.
while True:
self.lock = lock #this is just passed down evey tick so that threads can lock them selfs when writing to the shell
self.Update() #Calls the update on all child classes
with cond:
cond.wait()#This makes all the threads waite(besides the tick thread) when they are done for the next tick.
def Update(self):
#This is a place holder.
#It stops classes that don't have a Update function crashing when called
pass
def Unload(self):
#this method will terminate the thread.... Don't know if this is even possible in python yet
#and then remove any active instances of itself befor removing the class instance
pass
#This class is made so that I did not have to rewrite self.lock.blablabla eatch time i wanted to print to the shell
def Print (self, message):
self.lock.acquire()
print(message)
self.lock.release()
#---------------------------------------------------------------------------------
class ChildClassA(BaseClass):
def __init__(self, name):
super(ChildClassA, self).__init__(name)
def BaseClassType(self):
return 'ChildClassA'
def Update(self):
self.Print('AAAAAAAAAAAAAAAAAAAAAAA')
#----------------------------------------------------------------------------------
class ChildClassB(BaseClass):
def __init__(self, name):
super(ChildClassB, self).__init__(name)
def Update(self):
#print(self.name, "This is a completley different action")
self.Print('BBBBBBBBBBBBBBBBBBB')
self.Hi()
def Hi(self):
self.Print("Hi")
#----------------------------------------------------------------------------------
#works now just like in unity
class ChildClassC(BaseClass): #the new class
def __init__(self, name): #this is the equivalent of start()
super(ChildClassC, self).__init__(name) #this is the onley extra bit but its just to pass some name data through the classes
def Update(self): #this is litaley the same as update() except it has self in the parameters
self.Print("CCCCCCCCCCCCCCCCCCCCCCCCCC")
#--------------------------------------------------------------------------------
obj1 = ChildClassA('Obj1')
obj2 = ChildClassB('Obj2')
obj3 = ChildClassC('Obj3')
i=0
d=False
while True:
if i >=10:
if d==False:
del obj1
d = True
i=i+1
print("D: ", d)
print("I: ", i)
不清楚你在问什么。 但是我猜这是以下之一:
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