I’m solving cs50 python week 1 ‘meal’ problem. I got a error “convert successfully returns decimal hours expected “7.5”, not ‘Errorn'” and another one is “can’t check until a frown turns upside down”. But the code is working properly in my system.

def main():
    print("If you use 12-hour time use '##:##a.m.' OR '##:##p.m.' format'")
    time_input = input("What time is it?  ").strip().split(":")

    # convert time to decimal
    time = convert(time_input)

    # check time and print meal time
    if 7.0<= time <=8.0:
        print("breakfast time")

    elif 12.0<= time <=13.0:
        print("lunch time")

    elif 18.0<= time <=19.0:
        print("dinner time")



def convert(t):

    #Condition for 12pm time
    if  t[0] == "12" and t[1].find("p.m.") != -1:
        t[1] = t[1].replace("p.m.", "") #Remove 'p.m.'

    #condtion of 12am time
    if  t[0] == "12" and t[1].find("a.m.") != -1:
        t[0] = "00" #If time is 12a.m. convert it to 0:0 time


    #Removing 'am' from user input
    if t[1].find("a.m.") != -1:
        t[1] = t[1].replace("a.m.", "")

    #Removing 'pm' from user input and adding 12 to make it 24 hour time.
    if t[1].find("p.m.") != -1:
        t[1] = t[1].replace("p.m.", "")
        t[0] = float(t[0])+12


    # convert string to float(hour)
    hour = float(t[0])
    # convert string to float(minute)
    minute = float(t[1]) / 60

    return hour + minute

if __name__ == "__main__":
    main()