Hello everybody, I finished project for Time Calculator in Python. My source codes is true, but it was error:

Here is my soure codes:

time_calculator.py

```
def add_time(start, duration, day_of_week=False):
days_of_the_week_index = {"monday": 0, "tuesday": 1, "wednesday": 2, "thursday": 3, "friday": 4, "saturday": 5, "sunday": 6}
days_of_the_week_array = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
duration_tuple = duration.partition(":")
print(duration_tuple)
duration_hours = int(duration_tuple[0])
duration_minutes = int(duration_tuple[2])
start_tuple = start.partition(":")
start_minutes_tuple = start.tuple[2].partition(" ")
start_hours = int(start_tuple[0])
start_minutes = int(start_minutes_tuple[0])
am_or_pm = start_minutes_tuple[2]
am_and_pm_flip = {"AM": "PM", "PM": "AM"}
amount_of_days = int(duration_hours / 24)
end_minutes = start_minutes + duration_minutes
if(end_minutes >= 60):
start_hours += 1
end_minutes = end_minutes % 60
amount_of_am_pm_flips = int((start_hours + duration_hours) / 12)
end_hours = (start_hours + duration_hours) % 12
end_minutes = end_minutes if end_minutes > 9 else "0" + str(end_minutes)
end_hours = end_hours = 12 if end_hours == 0 else end_hours
if(am_or_pm == "PM" and start_hours + (duration_hours % 12) >= 12):
amount_of_days += 1
am_or_pm = am_and_pm_flip[am_or_pm] if amount_of_am_pm_flips % 2 == 1 else am_or_pm
returnTime = str(end_hours) + ":" + str(end_minutes) + " " + am_or_pm
if(day_of_week):
day_of_week = day_of_week.lower()
index = int((days_of_the_week_index[day_of_week]) + amount_of_days) % 7
new_day = days_of_the_week_array[index]
returnTime += ", " + new_day
if(amount_of_days == 1):
return returnTime + " " + "(next day)"
elif(amount_of_days > 1):
return returnTime + " (" + str(amount_of_days) + " days later)"
return returnTime
```

File main.py

```
# This entrypoint file to be used in development. Start by reading README.md
from time_calculator import add_time
from unittest import main
print(add_time("11:06 PM", "2:02"))
print(add_time("8:16 PM", "466:02"))
print(add_time("11:59 PM", "24:05"))
# Run unit tests automatically
main(module='test_module', exit=False)
```

Can somebody help to fix this error in my project for Time Calculator in Python ?

Here is my solution: https://replit.com/@quanganh2001/boilerplate-time-calculator#main.py

Thank you very much!