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#!/usr/bin/env python
"""
Two progress bars that run in parallel.
"""
import threading
import time
from prompt_toolkit.shortcuts import ProgressBar
def main():
with ProgressBar() as pb:
# Two parallal tasks.
def task_1():
for i in pb(range(100)):
time.sleep(0.05)
def task_2():
for i in pb(range(150)):
time.sleep(0.08)
# Start threads.
t1 = threading.Thread(target=task_1)
t2 = threading.Thread(target=task_2)
t1.daemon = True
t2.daemon = True
t1.start()
t2.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 [t1, t2]:
while t.is_alive():
t.join(timeout=0.5)
if __name__ == "__main__":
main()
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