import traceback import time class A(object): def __init__(self): print(f'Initializing {self.__class__.__name__}') def __del__(self): print(f'Releasing {self.__class__.__name__}') class B(A): pass def tt(func, li): b = B() print('run tt 111 ...') for n in li: print(func(n)) print('run tt 222 ...') return 'CCCCCC' def test(n): a = A() try: x = 100/n print(n, x) time.sleep(2) except Exception: print('Exception') print(traceback.format_exc()) print('Exception go ...') return 'abnormal end from Exception in test...' # 因为test是一个函数, 函数一定会有返回值, 这个默认有 return None except KeyboardInterrupt: # 如果except捕获了KeyboardInterrupt异常,那么执行except KeyboardInterrupt:语句块,当执行到exit(2)语句时,解释器会把finally:语句块先执行完,然后释放资源, 然后退出程序前,打印Process finished with exit code 1到标准输出, print('exit 2')语句和print('End...')是执行不到了 print('KeyboardInterrupt') print(traceback.format_exc()) print('KeyboardInterrupt go ...') exit(2) print('exit 2') # 因为test是一个函数, 函数一定会有返回值, 这个默认有 return None finally: print('finally') print('normal end before return...') return 'normal end from test...' # 如果没有捕获到任何异常,那么函数执行到return 语句时,会先释放函数内的变量标识符(如果引用对象计数是1,那么解释器垃圾回收机制会释放标识符引用的对象),然后return 返回. if __name__ == '__main__': li = [1, 2, 0, 3, 0, 5] print(tt(test, li)) print('End...')
Initializing B
run tt 111 ...
Initializing A
1 100.0
finally
normal end before return...
Releasing A
normal end from test...
Initializing A
2 50.0
finally
normal end before return...
Releasing A
normal end from test...
Initializing A
Exception
Traceback (most recent call last):
File "C:\Git_pro\ttttttttttttttttttttttttt\test.py", line 25, in test
x = 100/n
ZeroDivisionError: division by zero
Exception go ...
finally
Releasing A
abnormal end from Exception in test...
Initializing A
3 33.333333333333336
finally
normal end before return...
Releasing A
normal end from test...
Initializing A
Exception
Traceback (most recent call last):
File "C:\Git_pro\ttttttttttttttttttttttttt\test.py", line 25, in test
x = 100/n
ZeroDivisionError: division by zero
Exception go ...
finally
Releasing A
abnormal end from Exception in test...
Initializing A
5 20.0
finally
normal end before return...
Releasing A
normal end from test...
run tt 222 ...
Releasing B
CCCCCC
End...
Process finished with exit code 0
----------------------------------在迭代列表中的第二元素后,在time.sleep(2)中, 执行Ctrl + C, 触发KeyboardInterrupt异常 如下:
Initializing B
run tt 111 ...
Initializing A
1 100.0
finally
normal end before return...
Releasing A
normal end from test...
Initializing A
2 50.0
KeyboardInterrupt
Traceback (most recent call last):
File "C:\Git_pro\Clone\cloudperformancetest\XGS\ooklatool\test.py", line 27, in test
time.sleep(2)
KeyboardInterrupt
KeyboardInterrupt go ...
finally
Releasing A
Releasing B
Process finished with exit code 2
标签:...,end,except,try,test,finally,Initializing,print,return From: https://www.cnblogs.com/zfplost/p/17933432.html