mycode.py

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# time zone calculator
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​
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# enter the time
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valid_time = False
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while not valid_time:
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  time = input("Please enter the time (e.g. 13:05)")
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  try:
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      hours, minutes = time.split(":")
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      hours = int(hours)
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      minutes = int(minutes)
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      if hours < 24 and hours >= 0:
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        if minutes < 60 and minutes >= 0:
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            valid_time = True
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  except:
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    print("Invalid time")
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# enter the time zone difference
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time_difference = 1
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try:
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  time_difference = int(input("Please enter the difference in hours (or leave blank for +1)"))
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except:
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  print("Invalid time difference, using a default value of +1")
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​
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# adjust and display the time
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hours = (hours + time_difference) % 24
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print("The adjusted time is {:02}:{:02}".format(hours, minutes))
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​
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# Challenges:
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# 1) Change the default time difference to -1 
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# 2) Convert the time from the 24hr clock to the 12hr clock
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# 3) Make it so you can enter a time difference of hours:minutes rather than just hours