A simple alarm script

alarm.py

#!/usr/bin/env python

import sys
import time
import wave

import pyaudio

'''
>_ python pyalarm "8:00 PM"
>_ python pyalarm "20:00"
'''

class Alarm(object):
    def __init__(self, alarm_time):
        self.current_seconds = self.time_str_to_seconds(time.strftime('%I:%M %p')) + int(time.strftime('%S'))
        self.alarm_seconds = self.time_str_to_seconds(alarm_time)
        self.sleep_time = self.alarm_seconds - self.current_seconds
        if self.sleep_time < 0:
            self.sleep_time += 86400 # 24 hours
        print("Sleeping for {} seconds".format(self.sleep_time))
        time.sleep(self.sleep_time)
        print("Sounding Alarm")
        self.sound_alarm()

    def time_str_to_seconds(self, s):
        hour = s.split(':')[0]
        min = s.split(':')[1]
        if 'AM' in min:
            min = min.split(' ')[0]
        if 'PM' in min:
            min = min.split(' ')[0]
            hour = int(hour) + 12 # convert to military time
        return (3600 * int(hour)) + (int(min) * 60) # convert to seconds

    def sound_alarm(self, fp='alarm.wav'):
        #define stream chunk
        chunk = 1024

        #open a wav format music
        with wave.open(fp, 'rb') as f:
            #instantiate PyAudio
            p = pyaudio.PyAudio()
            #open stream
            stream = p.open(format=p.get_format_from_width(f.getsampwidth()),
                            channels=f.getnchannels(),
                            rate=f.getframerate(),
                            output=True)
            #read data
            data = f.readframes(chunk)
            #play stream
            while data:
                stream.write(data)
                data = f.readframes(chunk)
            #stop stream
            stream.stop_stream()
            stream.close()
            #close PyAudio
            p.terminate()


if __name__ == '__main__':
    Alarm(sys.argv[-1])