我试图制作一个将视频上传到服务器的线程Tkinter应用程序,问题是当我制作线程应用程序时,它以无限循环结束。这是代码:
class ThreadedTask(threading.Thread):
print "threaded task start"
def __init__(self, queue):
threading.Thread.__init__(self)
self.queue = queue
def start_upload(self):
PATH = os.path.abspath(os.path.join(os.path.dirname(__file__), "upload_video_to_server.py"))
if os.path.isfile(PATH) and os.access(PATH, os.R_OK):
print filename
upload_video_to_server.make_Info(filename=filename, title=video_title, description=video_desc, tags=video_keywords)
upload_video_to_server.upload_Start(filename=filename)
print "ok"
else:
tkMessageBox.showerror(
"Error!",
"Unable to find upload script!"
)
return
def tb_click():
print "tbclick start"
progress()
prog_bar.start()
global queue
queue = Queue.Queue()
ThreadedTask(queue).start()
app.after(100, process_queue)
def process_queue():
try:
print "try pass"
msg = queue.get(0)
print "MSG: ", msg
prog_bar.stop()
except Queue.Empty:
print "Queue is empty!"
app.after(100, process_queue)
def progress():
global prog_bar
print "prog bar is being made"
prog_bar = ttk.Progressbar(
app, orient="horizontal",
length=200, mode="indeterminate"
)
prog_bar.pack(side=TOP)
button1 = Button(app, text="START", width=20, command=tb_click)
button1.place(x=355, y=420)
app.mainloop()
运行此代码后,我立即得到"线程任务启动"打印出来,点击" START"按钮我进入无限循环打印"尝试通过"和#34;队列是空的" ...当我点击开始按钮(视频上传脚本不是从这段代码运行)时,什么都没有(最终用户可见)
这段代码有什么问题?有没有我错过的东西?
答案 0 :(得分:0)
看起来永远不会执行start_upload
。尝试将其重命名为run
。然后在调用start()
时执行。
你可能仍会得到“Queue is empty”消息,因为你似乎没有向队列中添加任何东西。