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question:Given the following code, create a function to find the length of the longest substring that does not have any repeating characters.
answer:def longest_unique_substring(s): Returns the length of the longest substring that does not have any repeating characters. start = 0 max_length = 0 char_index_map = {} for end in range(len(s)): if s[end] in char_index_map and char_index_map[s[end]] >= start: start = char_index_map[s[end]] + 1 char_index_map[s[end]] = end max_length = max(max_length, end - start + 1) return max_length
question:Create a number guessing game in Python where the player has three attempts and the computer generates a random number between 0 and 100.
answer:import random def number_guessing_game(): Runs a number guessing game. The computer generates a random number between 0 and 100. The player has three attempts to guess the correct number. number_to_guess = random.randint(0, 100) attempts = 3 while attempts > 0: try: player_guess = int(input("Enter your guess (between 0 and 100): ")) if player_guess < 0 or player_guess > 100: print("Your guess is out of bounds. Please try again.") continue if player_guess == number_to_guess: print("Congratulations! You guessed the correct number.") return True if player_guess < number_to_guess: print("Your guess is too low.") else: print("Your guess is too high.") attempts -= 1 print(f"You have {attempts} attempts left.") except ValueError: print("Invalid input. Please enter an integer.") print(f"Sorry, you've used all your attempts. The correct number was {number_to_guess}.") return False
question:Task: To create a Python program that acts as a calculator. The program should accept two numbers and an arithmetic operation (addition, subtraction, multiplication, or division) as input and return the result of the operation.
answer:def calculator(a, b, operation): Performs the given arithmetic operation on two numbers a and b. Valid operations are: 'add', 'subtract', 'multiply', 'divide'. if operation == 'add': return a + b elif operation == 'subtract': return a - b elif operation == 'multiply': return a * b elif operation == 'divide': if b == 0: raise ValueError("Cannot divide by zero") return a / b else: raise ValueError("Invalid operation. Valid operations are: 'add', 'subtract', 'multiply', 'divide'.")
question:Write a Python function to replace certain elements in a list. The function should iterate over the input list, and for each element that is a negative number, replace it with 0. However, to make the process more challenging, utilize a functional programming approach rather than the traditional for-loop structure. Handling multiple data types in the list is also required - in case of a non-integer or non-float type, replace it with None.
answer:from typing import List, Union def replace_elements(input_list: List[Union[int, float, any]]) -> List[Union[int, float, None]]: Replace negative numbers with 0 and non-integer/float types with None. return list(map(lambda x: 0 if isinstance(x, (int, float)) and x < 0 else None if not isinstance(x, (int, float)) else x, input_list))