1、捕获异常信息

import traceback

def disk():
    int('saaa')

def run():
    try:
        disk()
    except Exception:
        ret=traceback.format_exc()
        print(ret)

run()

 

2、约束类

 

import abc

class Person(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def talk(self):
        print('xx')


class Chinese(Person):
    pass

p=Chinese()

 

TypeError: Can't instantiate abstract class Chinese with abstract methods talk

 

3、

 

 

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6、