简化python中的循环

numbers = [1, 2, 3, 4, 5]
even_numbers = []
for num in numbers:
    if num % 2 == 0:
        even_numbers.append(num)

numbers = [1, 2, 3, 4, 5]
even_numbers = [num for num in numbers if num % 2 == 0]

numbers = [1, 2, 3, 4, 5]
incremented_numbers = list(map(lambda x: x + 1, numbers))

def fibonacci(n):
    a, b = 0, 1
    for _ in range(n):
        yield a
        a, b = b, a + b

fibonacci_sequence = list(fibonacci(10))

string = "hello world"
for index, char in enumerate(string):
    print(index, char)