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

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