问题
I want to build a chatroom with aiortc. Frist of all, I want to build a mockup with urwid as cli and asyncio. The urwid part is already running fine, user input is possible. I know want to run a coroutine that generates random text and works as chat clients texting in that chatroom.
I have tried to run my urwid function with the mainloop as an asyncio coroutine but without success. I don't know how to integrate an asynchronous function into my urwid mainloop.
def unhandled(key):
"""
functin to handle input
"""
global TEXT_INPUT
global lw_user_input
global lw_chatroom
global listbox_chatroom
if not isinstance(key, tuple):
if key == 'enter':
del lw_user_input[-1]
# create widegt and fill with user input
lw_chatroom.append(widget)
TEXT_INPUT = ""
listbox_chatroom.set_focus(len(lw_chatroom)-1, 'above')
elif key == 'esc':
raise urwid.ExitMainLoop()
elif key == 'backspace':
if len(lw_user_input) > 0:
user_input = lw_user_input[0].get_text()[0]
user_input = user_input[:-1]
del lw_user_input[-1]
TEXT_INPUT = user_input
lw_user_input.append(urwid.Text(TEXT_INPUT))
else:
TEXT_INPUT += key # repr(key)
if len(lw_user_input) > 0:
del lw_user_input[-1]
lw_user_input.append(urwid.Text(TEXT_INPUT))
else:
lw_user_input.append(urwid.Text(key))
def generate_output():
global lw_chatroom
global listbox_chatroom
while True:
# generate text and widgets and post with delay
lw_chatroom.append(chat_widget)
listbox_chatroom.set_focus(len(lw_chatroom)-1, 'above')
def create_cli():
# generate all widgets
uloop = urwid.MainLoop(frame, palette, screen,
unhandled_input=unhandled)
uloop.start()
if __name__ == '__main__':
create_cli()
I want to run generate_output() and unhandled(key) asynchronously. I have no idea how to.
回答1:
Ok, I figured it out.
It is as simple as this:
aloop = asyncio.get_event_loop() ev_loop = urwid.AsyncioEventLoop(loop=aloop) loop = urwid.MainLoop(frame, palette, screen, unhandled_input=unhandled, event_loop=ev_loop) aloop.create_task(generate_output()) loop.run()
来源:https://stackoverflow.com/questions/56966547/how-can-i-create-an-asynchronous-program-with-urwid-and-asyncio