CODEWITHSUNDEEP
python
dotancohen
dotancohen

Reputation: 31481

Hanging on connection to display

Consider the following code:

#!/usr/bin/env python 

from Xlib.display import Display
import os

def main():
        disp = Display() # connect to display
        while True:
                print("1")
                event = disp.next_event()
                print("2")
                if event.type == Xlib.protocol.event.KeyPress:
                        print("keypress!")

if __name__ == '__main__':
        main()

This code outputs 1 but does not output 2. It seems to be hanging on the display connection. Why might that be? Thank you.

Upvotes: 0

Views: 59

Answers (1)

Tarantula
Tarantula

Reputation: 19862

The method next_event() is a blocking method, see the documentation:

Return the next event in the event queue. If the event queue is empty, block until an event is read from the network, and return that one.

If it is blocked it is because no event has yet arrived.

Upvotes: 1

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