Funções de retorno para um jogo de matemática

Você está criando um jogo educacional de matemática em que o jogador digita um termo matemático e seu programa retorna uma função que corresponde a esse termo. Por exemplo, se o usuário digitar "add", seu programa retornará uma função que adiciona dois números. Até agora, você só implementou a função "add". Agora você deseja incluir uma função "subtrair".

Este exercicio faz parte do curso

Como escrever funções em Python

Instruções do exercicio

Defina a função subtract(). Ele deve receber dois argumentos e retornar o primeiro argumento menos o segundo argumento.

exercicio interativo prático

Tente este exercicio completando este código de exemplo.

def create_math_function(func_name):
  if func_name == 'add':
    def add(a, b):
      return a + b
    return add
  elif func_name == 'subtract':
    # Define the subtract() function
    ____
      ____
    return subtract
  else:
    print("I don't know that one")
    
add = create_math_function('add')
print('5 + 2 = {}'.format(add(5, 2)))

subtract = create_math_function('subtract')
print('5 - 2 = {}'.format(subtract(5, 2)))

Editar e Executar Código

Este exercicio faz parte do curso

Como escrever funções em Python

IntermediárioNível de habilidade

4.8+

Comece o curso gratuitamente

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Exercise 1: Docstrings Exercise 2: Crafting a docstring Exercise 3: Retrieving docstrings Exercise 4: Docstrings to the rescue!Exercise 5: DRY and "Do One Thing"Exercise 6: Extract a function Exercise 7: Split up a function Exercise 8: Pass by assignment Exercise 9: Mutable or immutable?Exercise 10: Best practice for default arguments

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Exercise 1: Using context managers Exercise 2: The number of cats Exercise 3: The speed of cats Exercise 4: Writing context managers Exercise 5: The timer() context manager Exercise 6: A read-only open() context manager Exercise 7: Advanced topics Exercise 8: Context manager use cases Exercise 9: Scraping the NASDAQ Exercise 10: Changing the working directory

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Exercise 1: As funções são objetos Exercise 2: Criando um aplicativo de dados de linha de comando Exercise 3: Revisar o código de seu colega de trabalho Exercise 4: Funções de retorno para um jogo de matemática

Exercicio Atual

Exercise 5: Escopo Exercise 6: Compreensão do escopo Exercise 7: Modificação de variáveis fora do escopo local Exercise 8: Fechamentos Exercise 9: Verificação de fechamento Exercise 10: Os fechamentos mantêm seus valores seguros Exercise 11: Decoradores Exercise 12: Usando a sintaxe do decorador Exercise 13: Definição de um decorador

Now that you understand how decorators work under the hood, this chapter gives you a bunch of real-world examples of when and how you would write decorators in your own code. You will also learn advanced decorator concepts like how to preserve the metadata of your decorated functions and how to write decorators that take arguments.

Exercise 1: Real-world examples Exercise 2: Print the return type Exercise 3: Counter Exercise 4: Decorators and metadata Exercise 5: Preserving docstrings when decorating functions Exercise 6: Measuring decorator overhead Exercise 7: Decorators that take arguments Exercise 8: Run_n_times()Exercise 9: HTML Generator Exercise 10: Timeout(): a real world example Exercise 11: Tag your functions Exercise 12: Check the return type Exercise 13: Great job!