python-3.4

I am trying to properly understand and implement two concurrently running Task objects using Python 3's relatively new asyncio module. In a nutshell, asyncio seems designed to handle asynchronous processes and concurrent Task execution over an event loop. It promotes the use of await (applied in async functions) as a callback-free way to wait for and use a result, without blocking the event loop. (Futures and callbacks are still a viable alternative.) It also provides the asyncio.Task() class, a specialized subclass of Future designed to wrap coroutines. Preferably invoked by using the asyncio

I have been trying to learn how move canvas items from google, however the method shown most places doesnt seem to work for me as intended. right now i am just trying to get a ball move from one side of the screen to the other over the period of 1 second from tkinter import * root = Tk() c = Canvas(root, width = 200, height = 100) c.pack() ball = c.create_oval(0, 25, 50, 75) for i in range(25): c.move(ball, 6, 0) root.after(40) root.mainloop() when run, this seems to move the ball before opening the window, however if i call upon mainloop first, the window opens but the ball doesn't move.

Trying a "stoppable" thread from https://stackoverflow.com/a/325528/1619432 like so: import sys import threading import time import logging class StoppableThread(threading.Thread): """Thread class with a stop() method. The thread itself has to check regularly for the stopped() condition.""" def __init__(self): print( "base init", file=sys.stderr ) super(StoppableThread, self).__init__() self._stop = threading.Event() def stop(self): print( "base stop()", file=sys.stderr ) self._stop.set() def stopped(self): return self._stop.is_set() class datalogger(StoppableThread): """ """ import time def _

this is my setup.py file for installing my python program, after the installation using python3 setup.py install an entry to my program was created named testmain , when i did pip3 freeze it showed abc==0.1 in its output ,so i uninstalled it using pip3 with pip3 uninstall abc , though the packages were uninstalled but there still existed the entry testmain on my path , is there a way that pip3 also removes this entry during the uninstall or any other way that i can cleanly uninstall my programs under same scenario ? from setuptools import setup setup(name='abc', version='0.1', description=

exe build successfully by using cx-freeze. But it shows the following error when I execute the exe file: from . import _methods ImportError: cannot import name '_methods' Rodolfo This question was already answer here: Why am I getting this ImportError? but for the sake of completeness here is the answer for this specific case: cx_freeze is not importing the optional module _method , so you have to tell him explicitly to do it. additional_mods = ['numpy.core._methods', 'numpy.lib.format'] setup(name='xyz', version='0.4', description='xyz script', options = {'build_exe': {'includes': additional

I have this really small test program which does nothing apart from a executing an asyncio event loop: import asyncio asyncio.get_event_loop().run_forever() When I run this program on Linux and press Ctrl + C , the program will terminate correctly with a KeyboardInterrupt exception. On Windows pressing Ctrl + C does nothing (tested with Python 3.4.2). A simple inifinite loop with time.sleep() raises the KeyboardInterrupt correctly even on Windows: import time while True: time.sleep(3600) Why does the asyncio's event loop suppress the KeyboardInterrupt on Windows? This is a bug, sure. See issue

I'm trying to write a Collatz program using the guidelines from a project found at the end of chapter 3 of Automate the Boring Stuff with Python. I'm using python 3.4.0 . Following is the project outline: Write a function named collatz() that has one parameter named number. If the number is even, then collatz() should print number // 2 and return this value. If the number is odd, then collatz() should print and return 3 * number + 1 . Then write a program that lets the user type in an integer and that keeps calling collatz() on that number until the function returns the value 1 . The output of