Created an Alarm clock

Alarm Clock/Alarm_clock.py

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+""" Alarm Clock
+
+----------------------------------------
+
+"""
+
+import datetime
+
+import os
+
+import time
+
+import random
+
+import webbrowser
+
+# If video URL file does not exist, create one
+
+if not os.path.isfile("youtube_alarm_videos.txt"):
+
+print('Creating "youtube_alarm_videos.txt"...')
+
+with open("youtube_alarm_videos.txt", "w") as alarm_file:
+
+alarm_file.write("https://www.youtube.com/watch?v=anM6uIZvx74")
+
+def check_alarm_input(alarm_time):
+
+"""Checks to see if the user has entered in a valid alarm time"""
+
+if len(alarm_time) == 1: # [Hour] Format
+
+if alarm_time[0] < 24 and alarm_time[0] >= 0:
+
+return True
+
+if len(alarm_time) == 2: # [Hour:Minute] Format
+
+if alarm_time[0] < 24 and alarm_time[0] >= 0 and \
+
+alarm_time[1] < 60 and alarm_time[1] >= 0:
+
+return True
+
+elif len(alarm_time) == 3: # [Hour:Minute:Second] Format
+
+if alarm_time[0] < 24 and alarm_time[0] >= 0 and \
+
+alarm_time[1] < 60 and alarm_time[1] >= 0 and \
+
+alarm_time[2] < 60 and alarm_time[2] >= 0:
+
+return True
+
+return False
+
+# Get user input for the alarm time
+
+print("Set a time for the alarm (Ex. 06:30 or 18:30:00)")
+
+while True:
+
+alarm_input = input(">> ")
+
+try:
+
+alarm_time = [int(n) for n in alarm_input.split(":")]
+
+if check_alarm_input(alarm_time):
+
+break
+
+else:
+
+raise ValueError
+
+except ValueError:
+
+print("ERROR: Enter time in HH:MM or HH:MM:SS format")
+
+# Convert the alarm time from [H:M] or [H:M:S] to seconds
+
+seconds_hms = [3600, 60, 1] # Number of seconds in an Hour, Minute, and Second
+
+alarm_seconds = sum([a*b for a,b in zip(seconds_hms[:len(alarm_time)], alarm_time)])
+
+# Get the current time of day in seconds
+
+now = datetime.datetime.now()
+
+current_time_seconds = sum([a*b for a,b in zip(seconds_hms, [now.hour, now.minute, now.second])])
+
+# Calculate the number of seconds until alarm goes off
+
+time_diff_seconds = alarm_seconds - current_time_seconds
+
+# If time difference is negative, set alarm for next day
+
+if time_diff_seconds < 0:
+
+time_diff_seconds += 86400 # number of seconds in a day
+
+# Display the amount of time until the alarm goes off
+
+print("Alarm set to go off in %s" % datetime.timedelta(seconds=time_diff_seconds))
+
+# Sleep until the alarm goes off
+
+time.sleep(time_diff_seconds)
+
+# Time for the alarm to go off
+
+print("Wake Up!")
+
+# Load list of possible video URLs
+
+with open("youtube_alarm_videos.txt", "r") as alarm_file:
+
+videos = alarm_file.readlines()
+
+# Open a random video from the list
+
+webbrowser.open(random.choice(videos))