Greetings, My name is Vojta and I am blind student. I am slowly learning Python for about 4 years and I like it alot, mostly its ability to run on various platforms. My primary system is Ubuntu 12.04, but I have Windows XP at hand. I am using python 2.7. I have learned basics from the book A byte of Python (for version 2.X) and something from Dive into Python. But most things I learned by trial and error and thanks to solutions on stackoverflow.com. I Don't know much about good programming concepts in Python, just in general, so feel free to educate me about them.
I haven't created anything great yet, but I am working on a game for blind people. It is a simple game of reaction, but I have to start with something, my next plan is Sudoku game. I am using Pygame for handling of sounds and keyboard events, speech dispatcher under Linux and pyttsx under Windows to provide speech output, numpy for sound cutting and my two little and simple modules for providing menu system and unified interface for both speech engines. During the development, I discovered, that I have to use multithreading to be able to check for key presses and manage the game at the same time. I tried threading module but this wasn't enough for me, because function running in the separate thread needed to access variables in the main thread at least I couldn't find the way how to do that. So I switched to multiprocessing and started using pipes for communication between processes. All is working well, except for one thing. My menu module uses a loop to check for keyboard events through pygame. I don't import pygame into my module directly, but rather pass it through my main module like this: menu.pygame = pygame All was working well until I started using multiprocessing. I may have a probable cause but I need your help. In my main module I am running a similar loop for checking keyboard input in separate process. When a player loses, the loop finishes and I join the process. Then the menu module kicks in and should launch its own loop checking for pygame keyboard events, but right after doing it it prints: [xcb] Unknown sequence number while processing queue [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called [xcb] Aborting, sorry about that. python: ../../src/xcb_io.c:273: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed received SigAbrt - core dumped Are atachments allowed here? I can send you my whole code. Please help me, if you can. Thank you very much, Vojta -- http://mail.python.org/mailman/listinfo/python-list