# ============================================= # Galactic Pet Health System # Topic: Try/Except, Raising Errors, # Custom Exceptions, Assertions # # INSTRUCTIONS: # * Only fill the regions marked with "TODO". # * Do NOT change function names, parameters, or main(). # * Do NOT remove any given code except the 'pass' lines # that are explicitly marked with TODO. # ============================================= # ---------- AUTO INPUT CONFIG (NO MANUAL TYPING) ---------- USE_TEST_INPUT = True # This sequence matches the sample output in the lab sheet: # 3 pets: # Pet 1: Lumu, 40 -> 38 # Pet 2: Zorp, 50 -> 70 (CRITICAL gain) # Pet 3: Blip, 60 -> 61 test_inputs = iter([ "3", "Lumu", "40", "38", "Zorp", "50", "70", "Blip", "60", "61" ]) def test_input(prompt=""): """ Replacement for built-in input() when USE_TEST_INPUT is True. It takes values from test_inputs and prints them as if the user had typed them. """ try: value = next(test_inputs) except StopIteration: value = "" # Ekranda normal input gibi görünmesi için: if prompt: print(f"{prompt}{value}") else: print(value) return value # built-in input() fonksiyonunu override et if USE_TEST_INPUT: import builtins builtins.input = test_input # ---------- PART 1: SAFE INTEGER INPUT (15 pts) ---------- def get_int(prompt): """ TODO (Part 1): - Continuously ask the user for input using the given prompt. - Try to convert the input text to an integer. - If conversion fails (ValueError): * print an error message (for example: "Invalid integer, please try again.") * and ask again. - If conversion succeeds: * return the integer value. You may use a while-loop with try/except. """ # WRITE YOUR CODE BELOW while True: try: return int(input(prompt)) except ValueError: print("invalid integer") # --------------------- # TODO: remove this pass after implementing your solution # --------------------- # ---------- HELPER FUNCTION: SAFE DIVISION (GIVEN) ---------- def safe_divide(a, b): """ Safely compute a / b. Returns: - result of a / b if no error occurs, - None if division by zero or wrong type occurs. You can use this function in other parts of the lab. DO NOT modify this function. """ try: return a / b except ZeroDivisionError: print("Error: Division by zero is not allowed.") return None except TypeError: print("Error: Both arguments must be numbers.") return None # ---------- PART 2: WEIGHT VALIDATION (10 pts) ---------- def validate_weight(w): """ TODO (Part 2): - A valid Galactic pet weight is between 1 and 300 (inclusive). - If w is OUTSIDE this range: * raise ValueError("Invalid weight range.") - Do NOT print anything in this function. """ # WRITE YOUR CODE BELOW if w <=1 or w >=300: raise ValueError("Invalid weight range") # --------------------- # TODO: remove this pass after implementing your solution # --------------------- # ---------- CUSTOM EXCEPTION (GIVEN) ---------- class CriticalHealthError(Exception): """ Custom exception used for dangerous weight changes. This class is already provided. DO NOT modify this class. """ pass # ---------- PART 3: EVALUATE A PET (30 pts) ---------- def evaluate_pet(prev_w, curr_w): """ TODO (Part 3): - Use validate_weight(prev_w) and validate_weight(curr_w) to ensure both weights are in the valid range. - Compute the percentage change of weight using safe_divide: percent = (curr_w - prev_w) / prev_w * 100 - If safe_divide returns None: * raise CriticalHealthError("Unable to compute change.") - If the weight change is critical: * percent < -12 OR percent > 25 * raise CriticalHealthError with a short message. - Otherwise, set a status string: * -12 <= percent < -4 -> "loss" * 4 <= percent <= 25 -> "gain" * otherwise -> "stable" - Return a tuple (percent, status) for non-critical cases. Only this function should classify the change as loss/gain/stable. """ # WRITE YOUR CODE BELOW validate_weight(prev_w) validate_weight(curr_w) try: percent = safe_divide((curr_w-prev_w),prev_w)*100 except: if safe_divide((curr_w-prev_w),prev_w) == None: raise CriticalHealthError("unable to compute change") if percent < -12 or > 25: raise CriticalHealthError elif: if -12<= percent <-4: status = "loss" elif 4<= percent <=25: status = "gain" elif: status = "stable" return(percent,status) # --------------------- # TODO: remove this pass after implementing your solution # --------------------- # ---------- PART 4: READING MULTIPLE PETS (25 pts) ---------- def read_pets(): """ TODO (Part 4): - Ask the user (using get_int) how many alien pets will be checked today. - Use an assertion to enforce: 1 <= number_of_pets <= 40 - For each pet: * read the pet name (using input). If the user enters an empty string, replace it with a default name such as "Pet_1", "Pet_2", ... * repeatedly: - read previous and current weights using get_int - try to validate and evaluate the pet: validate_weight(...) evaluate_pet(...) using try/except: · on ValueError (invalid range): print the error message and ask for the weights again. · on CriticalHealthError: print the error message, set the pet's status to "CRITICAL", choose a reasonable percent value (for example, you may store None), then stop asking weights for this pet. * create a dictionary for each pet with keys such as: "name", "previous", "current", "percent", "status" and append it to a list. - Return the list that contains all pet dictionaries. """ # WRITE YOUR CODE BELOW number_of_pets=get_int("How many alien pets will be checked today?") assert 1<= number_of_pets <=40 while True: get_int(prompt) try: validate_weight() evaluate_pet() except ValueError: print("value error input again") except CriticalHealthError: status = "critical" # --------------------- pass # TODO: remove this pass after implementing your solution # --------------------- # ---------- PART 5: ANALYZE PETS (20 pts) ---------- def analyze_pets(pets): """ TODO (Part 5): - Use assertions to check: * pets list is not empty, * each pet["current"] is positive. - Compute and/or determine: * total number of pets, * total of current weights, * average current weight (use safe_divide), * heaviest pet (maximum current weight), * lightest pet (minimum current weight), * number of pets whose status is "CRITICAL". - Print a summary similar to the lab sheet example: === Summary === Total pets: ... Average current weight: ... kg Heaviest pet : ( kg) Lightest pet : ( kg) Number of CRITICAL cases: ... - The exact wording can differ slightly, but the information and structure should be similar. """ # WRITE YOUR CODE BELOW assert len(petlist) !=0,"pet list is empty" assert i > 0 for i in petlist totalnumberofpets = len() # --------------------- # TODO: remove this pass after implementing your solution # --------------------- # ---------- MAIN PROGRAM (DO NOT MODIFY) ---------- def main(): print("=== Galactic Pet Health System ===") try: pets = read_pets() analyze_pets(pets) except AssertionError as e: print("Assertion failed:", e) finally: print("\nProgram finished. (finally block executed.)") if __name__ == "__main__": main()