import traceback
from io import StringIO
import sys


class Capturing(list):
    def __enter__(self):
        self._stdout = sys.stdout
        # 将err、out输出到内存中
        sys.stderr = sys.stdout = self._stringio = StringIO()
        return self

    def __exit__(self, *args):
        self.extend(self._stringio.getvalue().splitlines())
        # 释放内存
        del self._stringio
        sys.stdout = self._stdout


def test():
    print('asdfadfafafsdf')


with Capturing() as output:
    print('hello world')
    try:
        1 / 0
    except Exception as e:
        traceback.print_exc()

test()
print('output:', output)

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