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#!/usr/bin/env python
"""
More complex demonstration of what's possible with the progress bar.
"""
import threading
import time
from prompt_toolkit import HTML
from prompt_toolkit.shortcuts import ProgressBar
def main():
with ProgressBar(
title=HTML("<b>Example of many parallel tasks.</b>"),
bottom_toolbar=HTML("<b>[Control-L]</b> clear <b>[Control-C]</b> abort"),
) as pb:
def run_task(label, total, sleep_time):
for i in pb(range(total), label=label):
time.sleep(sleep_time)
threads = [
threading.Thread(target=run_task, args=("First task", 50, 0.1)),
threading.Thread(target=run_task, args=("Second task", 100, 0.1)),
threading.Thread(target=run_task, args=("Third task", 8, 3)),
threading.Thread(target=run_task, args=("Fourth task", 200, 0.1)),
threading.Thread(target=run_task, args=("Fifth task", 40, 0.2)),
threading.Thread(target=run_task, args=("Sixth task", 220, 0.1)),
threading.Thread(target=run_task, args=("Seventh task", 85, 0.05)),
threading.Thread(target=run_task, args=("Eight task", 200, 0.05)),
]
for t in threads:
t.daemon = True
t.start()
# Wait for the threads to finish. We use a timeout for the join() call,
# because on Windows, join cannot be interrupted by Control-C or any other
# signal.
for t in threads:
while t.is_alive():
t.join(timeout=0.5)
if __name__ == "__main__":
main()
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