python怎么将字符串转换为数字

numbers = ['1', '5', '10', '8']

numbers = [1, 5, 10, 8]

new_numbers = [];

for n in numbers:

  new_numbers.append(int(n));

numbers = new_numbers;

numbers = [ int(x) for x in numbers ]

numbers = map(int, numbers)

numbers = list(map(int, numbers))

for i，v in enumerate(numbers):

    numbers[i] = int(v)