Python code that converts time in am,pm to 24H format and 24H to am,pm

format_ampm_to_24H.py

def format_ampm_to_24H(time_str):
   time_parts = time_str.lower().strip().split()
   try:
       hours, minutes = map(int, time_parts[0].split(":"))
   except ValueError:
       return "Invalid input!"

   if len(time_parts) == 2:
       meridian = time_parts[1].lower()
       if meridian == "a.m.":
           if hours == 12:
               hours = 0
       elif meridian == "p.m.":
           if hours != 12:
               hours += 12
       else:
           return "Invalid input!"
   else:
       if hours >= 0 and hours <= 23:
           if hours >= 12:
               meridian = "p.m."
               if hours > 12:
                   hours -= 12
           else:
               meridian = "a.m."
               if hours == 0:
                   hours = 12
           return f"{hours:02d}:{minutes:02d} {meridian}"
       else:
           return "Invalid input!"

   return f"{hours:02d}:{minutes:02d}"


user_input = input("Enter time in 12-hour or 24-hour format: ")
format_ampm_to_24H = format_ampm_to_24H(user_input)
print("Converted time:", format_ampm_to_24H)