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/*** Native messaging "ping_pong" example in C.
 *
 *  It is reimplementation of the corresponding Python example from
 *  https://github.com/mdn/webextensions-examples/tree/master/native-messaging
 *
 *    # Python 3.x version
 *    # Read a message from stdin and decode it.
 *    def getMessage():
 *        rawLength = sys.stdin.buffer.read(4)
 *        if len(rawLength) == 0:

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#!/usr/bin/env python3
"""
https://www.youtube.com/watch?v=BleOgPhsdfc
"""
from dataclasses import dataclass


@dataclass
class RedLightViolation:
    """..."""

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#!/usr/bin/env python3
"""Get external ip using DNS, HTTP, STUN protocols.

Print the first result (the fastest).

Usage:
  $ python3 -m external_ip [--quiet]

Optional dependencies:
  $ python3 -m pip install aidns pynat pystun3

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/*.json
/*.xml

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#!/usr/bin/env python3
"""
- read subprocess output without threads using a socket pair
- show the output in a tkinter GUI (while the process is still running)
- stop subprocess on a button press
"""
import logging
import os
import socket
import sys

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#!/usr/bin/env python3
"""Entry -> queue -> (client request) -> (server response) -> Label"""
import os
import socket
from threading import Thread
from tkinter import BOTH, Tk, ttk
from queue import Queue, Full


def echo_server(host, port):

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#!/usr/bin/python3
"""Demonstrate that without `sys.exit()` exit status is zero after `app.exit(1)`."""
import sys
from PyQt5.Qt import QApplication, QPushButton


app = QApplication(sys.argv)
w = QPushButton("Exit 1")
w.clicked.connect(lambda: app.exit(1))
w.show()

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#!/usr/bin/env python3
"""Disable button on pressing it."""
import tkinter.ttk

root = tkinter.Tk()
button = tkinter.ttk.Button(text='Press Me Once',
                            command=lambda: button.state(['disabled']))
button.pack()
root.mainloop()

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#!/usr/bin/env python
"""Emulate: grep -Ff <letters> [<words>]"""
import curses
import os
import sys
import re


if hasattr(sys.stdout, 'fileno') and os.isatty(sys.stdout.fileno()):
    curses.setupterm()