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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_timezone(value, tz=None):
 """If the value is naive, then the timezone is added to it. If no timezone is given, timezone.get_current_timezone() is used. """

    tz = tz or timezone.get_current_timezone()
    try:
        if timezone.is_naive(value):
            return timezone.make_aware(value, tz)
    except AttributeError:  # 'datetime.date' object has no attribute 'tzinfo'
        dt = datetime.datetime.combine(value, datetime.time())
        return timezone.make_aware(dt, tz)
    return value