Phidgets Forums

Code: Select all

try
    code ...
except KeyboardInterrupt
    ctrl-C exception handling code ...

Code: Select all

from Phidget22.Phidget import *
from Phidget22.Devices.DigitalOutput import *
import time

import argparse

open_phidget = True

parser = argparse.ArgumentParser(
    description='show phidget python issue w/ctrl-C on macos.')

parser.add_argument('--open-phidget', default=open_phidget, action=argparse.BooleanOptionalAction,
                    help=f"disable to skip opening phidget: {open_phidget}")

args = parser.parse_args()

open_phidget= args.open_phidget

def main():
    exit_reason = "count completed"
    running = True

    count = 1
    max_count = 20
    sleep = 0.1

    d0 = DigitalOutput()

    if open_phidget:
        d0.openWaitForAttachment(5000)
        d0.setDutyCycle(0.5)


    print(f"\nCounting to {max_count} over {max_count * sleep} seconds. Try interrupting with ctrl-C")

    try:
        while running:
            print(count)
            count += 1
            running = count <= max_count
            time.sleep(sleep)

    except KeyboardInterrupt:
        exit_reason = "ctrl-C"

    print(f"\nExit reason: {exit_reason}\n")

    if open_phidget:
        d0.close()

main()

Code: Select all

% python test-ctrl-c.py --help           
usage: test-ctrl-c.py [-h] [--open-phidget | --no-open-phidget]

show phidget python issue w/ctrl-C on macos.

options:
  -h, --help            show this help message and exit
  --open-phidget, --no-open-phidget
                        disable to skip opening phidget: True

Code: Select all

Counting to 20 over 2.0 seconds. Try interrupting with ctrl-C
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Exit reason: count completed

Code: Select all

% python test-ctrl-c.py --open-phidget 

Counting to 20 over 2.0 seconds. Try interrupting with ctrl-C
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^C%

Code: Select all

% python test-ctrl-c.py --no-open-phidget

Counting to 20 over 2.0 seconds. Try interrupting with ctrl-C
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^C
Exit reason: ctrl-C