Question

我记得在某个地方看过一篇关于能够在主线程中从python中获取绘图的帖子，但我似乎无法找到它。我的第一次尝试是这样的，但它不起作用。它最初不会崩溃（最终会崩溃），但不会发生绘图。我的想法是options是绘图函数的映射，每个函数都绘制到pyqtgraph或QTWidget等等。

from threading import *
from Queue import *

anObject1 = DrawingObject()
anObject2 = DrawingObject()
anObject3 = DrawingObject()


options = {
    0  : anObject1.drawing_func,
    1  : anObject2.drawing_func,
    2  : anObject3.drawing_func,
    3 : updateNon,
}

def do_work(item): #item is a tuple with the item at 0 is the index to which function
    #print str(item) + "\n"
    options[item[0]](item)

def worker():
    while True:
        item = q.get()
        do_work(item)
        q.task_done()

q = Queue()

#This function is a callback from C++
def callback(s, tuple):
    #options[tuple[0]](tuple) #this works
    q.put(tuple) #this does not



num_worker_threads = 3
for i in range(num_worker_threads):
     t = Thread(target=worker)
     t.daemon = True
     t.start()

从主线程中脱颖而出

0 个答案: