编辑
我尝试使用管理器在进程之间共享我的信件.但我现在唯一拥有的是在Python Shell中打印的Value(‘ctypes.c_char_p’,'(你在这里点击的键)’),但仍然没有声音.
使用管理器时,控制台似乎比平常慢一点.在我按下键和屏幕上显示值之间有几乎一秒的延迟.
我的代码现在看起来像这样：
#Import
from tkinter import *
import wave
import winsound
import multiprocessing
#Functions
def key(event):
temp = event.char
manager = multiprocessing.Manager()
manager.Value(ctypes.c_char_p,temp)
hitkey = manager.Value(ctypes.c_char_p,temp)
instance = multiprocessing.Process(target=player,args=(hitkey,))
instance.start()
def player(hitkey):
print(hitkey + "1")
winsound.PlaySound(hitkey + '.wav',winsound.SND_FILENAME|winsound.SND_NOWAIT|winsound.SND_ASYNC)
if __name__ == "__main__":
#Initialisation
fenetre = Tk()
frame = Frame(fenetre,width=200,height=100)
#TK
frame.focus_set()
frame.bind("<Key>",key)
frame.pack()
fenetre.mainloop()
解决方法
multiprocessing.Value没有特殊的语法,它只是一个类似于任何其他的类. Value构造函数的签名描述得非常好：
multiprocessing.Value(typecode_or_type,*args[,lock])Return a
ctypesobject allocated from shared memory. By default the return value is actually a synchronized wrapper for the object.
typecode_or_typedetermines the type of the returned object: it is either actypestype or a one character typecode of the kind used
by thearraymodule.*argsis passed on to the constructor for the
type.If
lockisTrue(the default) then a new lock object is created to synchronize access to the value. If lock is aLockor
RLockobject then that will be used to synchronize access to the
value. IflockisFalsethen access to the returned object will
not be automatically protected by a lock,so it will not necessarily
be “process-safe”.
你甚至有一些使用它的例子afterwards.具体来说,typecode_or_type可以是array模块文档中列出的一个类型代码(例如’i’代表有符号整数,’f’代表float等)或ctypes类型,如ctypes.c_int等.
如果您想要包含单个字母的值,您可以执行以下操作：
>>> import multiprocessing as mp
>>> letter = mp.Value('c','A')
>>> letter
<Synchronized wrapper for c_char('A')>
>>> letter.value
'A'
更新
您的代码的问题是类型代码’c’表示字符不是字符串.
如果要保存字符串,可以使用ctypes.c_char_p类型：
>>> import multiprocessing as mp
>>> import ctypes
>>> v = mp.Value('c',"Hello,World!")
Traceback (most recent call last):
File "<stdin>",line 1,in <module>
File "/usr/lib/python2.7/multiprocessing/__init__.py",line 253,in Value
return Value(typecode_or_type,*args,**kwds)
File "/usr/lib/python2.7/multiprocessing/sharedctypes.py",line 99,in Value
obj = RawValue(typecode_or_type,*args)
File "/usr/lib/python2.7/multiprocessing/sharedctypes.py",line 73,in RawValue
obj.__init__(*args)
TypeError: one character string expected
>>> v = mp.Value(ctypes.c_char_p,World!")
>>> v
<Synchronized wrapper for c_char_p(166841564)>
>>> v.value
'Hello,World!'