quamash asyncio sample

async.py

import asyncio
import atexit

from quamash import QEventLoop, QtGui, QtCore
from pyqtgraph import dockarea # Will import PyQt5.QtGui.QApplication


class MainWindow(QtGui.QMainWindow):
    def __init__(self, app, server):
        QtGui.QMainWindow.__init__(self)
        self.exit_request = asyncio.Event()

    def closeEvent(self, *args):
        self.exit_request.set()

    def save_state(self):
        return bytes(self.saveGeometry())

    def restore_state(self, state):
        self.restoreGeometry(QtCore.QByteArray(state))


async def slow_operation(n):
    await asyncio.sleep(1)
    print("Slow operation {} complete".format(n))


async def main():
    await asyncio.wait([
        slow_operation(1),
        slow_operation(2),
        slow_operation(3),
    ])


app = QtGui.QApplication([])
loop = QEventLoop(app)
asyncio.set_event_loop(loop)
atexit.register(loop.close)
#loop = asyncio.get_event_loop()
win = MainWindow(app, None)

win.show()
loop.run_until_complete(win.exit_request.wait())
loop.run_until_complete(main())