Time Calculator project Error

Python
1

I did all the code from the project in VSCode and then pasted it to replit. When I tried to run it returned " day = day.lower()
AttributeError: ‘NoneType’ object has no attribute ‘lower’ " but all worked fine in VSCode. My code:

def add_time(start, duration, day=None):
    #Transforming start to 24h clock
    start_split = start.split(":")
    if start[-2:] == "PM":
        start_split[0] = str(int(start_split[0])+12)
        start_split[1] = start_split[1].replace(" PM", "") 
        #start_split = ":".join(start_split)
    
    #Summing the time passed
    time_sum = []
    duration_split = duration.split(":")
    time_sum.append(int(start_split[0])+int(duration_split[0]))
    time_sum.append(int(start_split[1])+int(duration_split[1]))
    if time_sum[1] > 60:
        hours = int(time_sum[1]/60)
        time_sum[0] += hours
        time_sum[1] -= hours*60

    #dividing days
    days_count = 0
    if time_sum[0] >= 24:
        days_count += int(time_sum[0]/24)

    #days of the week
    day = day.lower()
    days = ['monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday']
    day_index = days.index(day)
    days.extend(days)
    day_index += days_count
    week_day = days[day_index]

    #converting back to 12h clock
    converted = []
    converted.append(time_sum[0] % 24)
    converted.append(time_sum[1])
    if len(str(converted[1])) < 2:
        converted[1] = "0" + str(converted[1])
    if converted[0] > 12:
        converted[0] = str(converted[0]-12)
        converted[1] = converted[1] + " PM"
    else:
        converted[0] = str(converted[0])
        converted[1] = converted[1] + " AM"
    converted = ":".join(converted)

    #Output
    if day == None:
        if days_count == 0:
            return converted 
        if days_count == 1:
            return converted + " (next day)"
        else:
            return converted + f" ({days_count} days later)"
    else:
        if days_count == 0:
            return converted + ", " + week_day.title()
        if days_count == 1:
            return converted + ", " + week_day.title() + " (next day)"
        else:
            return converted + ", " + week_day.title() + f" ({days_count} days later)"
2

day is optional parameter, and there are test cases, which are checking if function works without it. Consider what happens, when day is not passed to the function and it takes the default value None.

3

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