这不完全是我的应用程序,但非常相似。我创建了这个测试代码来显示问题。基本上我试图从 python 线程调用 tcl proc。当结果准备好时,Tcl proc 将回调到 python 函数。该结果将作为事件发布到 wx 框架。当我作为纯 python 代码运行时,它工作得很好。当我使用 tcl proc 时,整个应用程序崩溃,没有任何信息。如果我增加 wait_time (比如 100),那么即使使用 tcl 也能正常工作。是回调率高有问题还是我错过了其他东西。顺便说一句,这个应用程序在 Windows 上运行。
import wx
from Tkinter import Tcl
from threading import Thread
import wx.lib.newevent
from time import sleep
CountUpdateEvent, EVT_CNT_UPDATE = wx.lib.newevent.NewEvent()
tcl_code = 'proc tcl_worker {name max_count delay_time callback} { while {$max_count>0} {after $delay_time; $callback $name $max_count; incr max_count -1}}'
# Option to use Tcl or not for counter
# When enabled, Tcl will callback to python to upate counter value
use_tcl = True
# Option to create tcl interpreter per thread.
# Test shows single interpreter for all threads will fail.
use_per_thread_tcl = True
count = 5000
wait_time = 1 ;# in milliseconds
class Worker:
def __init__(self,name,ui,tcl):
global use_per_thread_tcl
self.name = name
self.ui = ui
if use_per_thread_tcl:
self.tcl = Tcl()
self.tcl.eval(tcl_code)
else:
self.tcl = tcl
self.target = ui.add_textbox(name)
self.thread = Thread(target=self.run)
self.thread.daemon = True
self.thread.start()
def callback(self, name, val):
evt = CountUpdateEvent(name=self.name, val=val, target=self.target)
wx.PostEvent(self.ui,evt)
def run(self):
global count, wait_time, use_tcl
if use_tcl:
# Register a python function to be called back from tcl
tcl_cmd = self.tcl.register(self.callback)
# Now call tcl proc
self.tcl.call('tcl_worker', self.name, str(count), str(wait_time), tcl_cmd)
else:
# Convert milliseconds to seconds for sleep
py_wait_time = wait_time / 1000
while count > 0:
# Directly call the callback from here
self.callback(self.name, str(count))
count -= 1
sleep(py_wait_time)
class MainWindow(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, title="Decrement Counter", size=(600, 100))
self._DoLayout()
self.Bind(EVT_CNT_UPDATE, self.on_count_update)
def _DoLayout(self):
self.sizer = wx.BoxSizer(wx.HORIZONTAL)
self.panels = []
self.tbs = []
self.xpos = 0
def add_textbox(self,name):
panel = wx.Panel(self, pos=(self.xpos, 0), size=(60,40))
self.panels.append(panel)
tb = wx.StaticText(panel, label=name)
tb.SetFont(wx.Font(16,wx.MODERN,wx.NORMAL,wx.NORMAL))
self.sizer.Add(panel, 1, wx.EXPAND, 7)
self.tbs.append(tb)
self.xpos = self.xpos + 70
return tb
def on_count_update(self,ev):
ev.target.SetLabel(ev.val)
del ev
if __name__ == '__main__':
app = wx.App(False)
frame = MainWindow(None)
tcl = Tcl()
tcl.eval(tcl_code)
w1 = Worker('A', frame, tcl)
w2 = Worker('B', frame, tcl)
w3 = Worker('C', frame, tcl)
w4 = Worker('D', frame, tcl)
w5 = Worker('E', frame, tcl)
w6 = Worker('F', frame, tcl)
w7 = Worker('G', frame, tcl)
w8 = Worker('H', frame, tcl)
frame.Show()
app.MainLoop()