Month: February 2019

import sys
sys.exit()

os._exit(errorcode)

References
https://stackoverflow.com/questions/73663/terminating-a-python-script

#!/usr/bin/env python
import signal
import sys
def signal_handler(sig, frame):
        print('You pressed Ctrl+C!')
        sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)
print('Press Ctrl+C')
signal.pause()

References
https://stackoverflow.com/questions/1112343/how-do-i-capture-sigint-in-python

class WindowsInhibitor:
    '''Prevent OS sleep/hibernate in windows; code from:
    https://github.com/h3llrais3r/Deluge-PreventSuspendPlus/blob/master/preventsuspendplus/core.py
    API documentation:
    https://msdn.microsoft.com/en-us/library/windows/desktop/aa373208(v=vs.85).aspx'''
    ES_CONTINUOUS = 0x80000000
    ES_SYSTEM_REQUIRED = 0x00000001

    def __init__(self):
        pass

    def inhibit(self):
        import ctypes
        print("Preventing Windows from going to sleep")
        ctypes.windll.kernel32.SetThreadExecutionState(
            WindowsInhibitor.ES_CONTINUOUS | \
            WindowsInhibitor.ES_SYSTEM_REQUIRED)

    def uninhibit(self):
        import ctypes
        print("Allowing Windows to go to sleep")
        ctypes.windll.kernel32.SetThreadExecutionState(
            WindowsInhibitor.ES_CONTINUOUS)

import os

osSleep = None
# in Windows, prevent the OS from sleeping while we run
if os.name == 'nt':
    osSleep = WindowsInhibitor()
    osSleep.inhibit()

# do slow stuff

if osSleep:
    osSleep.uninhibit()

References
https://trialstravails.blogspot.com/2017/03/preventing-windows-os-from-sleeping.html

from enum import Enum
class Color(Enum):
     RED = 1
     GREEN = 2
     BLUE = 3

References
https://docs.python.org/3/library/enum.html

dateTimeDifference = dateTimeA - dateTimeB
# Divide difference in seconds by number of seconds in hour (3600)  
dateTimeDifferenceInHours = dateTimeDifference.total_seconds() / 3600

References
https://stackoverflow.com/questions/43305577/python-calculate-the-difference-between-two-datetime-time-objects/43308104

1 –

'Hello, {}'.format(name)

Output

'Hello, Bob'

2 –

'Hey {name}, there is a 0x{errno:x} error!'.format(name=name, errno=errno)

Output

'Hey Bob, there is a 0xbadc0ffee error!'

3 –

f'Hello, {name}!'

Output

'Hello, Bob!'

References
https://realpython.com/python-string-formatting/