answer:Sure! Here's the updated code with the requested changes: ``` # Function to validate input def validate_input(user_input): # Split the user input into a list try: input_list = list(map(int, user_input.split())) except ValueError: print("Invalid input. Please enter a list of integers separated by spaces.") return # Check if the list contains any positive integers or negative integers positive_numbers = [num for num in input_list if num > 0] negative_numbers = [num for num in input_list if num < 0] # Compute the sum of positive integers and negative integers if len(positive_numbers) > 0: positive_sum = sum(positive_numbers) print("Sum of Positive Integers:", positive_sum) else: print("No positive integers in the list") if len(negative_numbers) > 0: negative_sum = sum(negative_numbers) print("Sum of Negative Integers:", negative_sum) else: print("No negative integers in the list") # Prompt the user for input user_input = input("Enter a list of integers separated by spaces: ") # Call the validation function validate_input(user_input) ``` This code will now: - Split the user input into a list of integers, or print an error message if the input is invalid - Separate the list into positive and negative integers - Calculate the sum of positive integers and print it, or print a message if there are no positive integers in the list - Calculate the sum of negative integers and print it, or print a message if there are no negative integers in the list

answer:Sure, here's the updated code with documentation and comments: ``` # Function to validate input and compute sums def validate_input(user_input): # Try to split the user input into a list of integers try: input_list = list(map(int, user_input.split())) except ValueError: # Catch any value errors print("Invalid input. Please enter a list of integers separated by spaces.") return # Separate the list into positive numbers and negative numbers positive_numbers = [num for num in input_list if num > 0] negative_numbers = [num for num in input_list if num < 0] # Calculate the sum of positive numbers and print it if len(positive_numbers) > 0: positive_sum = sum(positive_numbers) print("Sum of Positive Integers:", positive_sum) else: print("No positive integers in the list") # Calculate the sum of negative numbers and print it if len(negative_numbers) > 0: negative_sum = sum(negative_numbers) print("Sum of Negative Integers:", negative_sum) else: print("No negative integers in the list") # Prompt the user for input user_input = input("Enter a list of integers separated by spaces: ") # Call the validation function validate_input(user_input) ``` Documentation: ``` This program prompts the user to enter a list of integers separated by spaces. It then computes the sum of all positive integers in the list and the sum of all negative integers in the list, if any. The program handles invalid input gracefully and prints appropriate error messages. The program works by using a validation function, validate_input, which takes a user input string as its argument. The function first tries to convert the string into a list of integers using the built-in `map` function, which applies the `int` function to each element of the list. If the string contains non-integer values, a `ValueError` is raised and an error message is printed. If the string is empty or contains only whitespace, an empty list is returned. After converting the input into a list of integers, the function separates the list into two new lists: one containing all positive integers, and one containing all negative integers. If either list is empty, a message indicating that there are no positive or negative integers, respectively, is printed. Otherwise, the sums of the positive and negative integers are calculated using the built-in `sum` function and printed. The program then prompts the user for input and calls the validation function to compute and print the sums of the positive and negative integers in the input.

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