suite_for_Exception1_to_ExceptionN_with_Argument reason是异常类的实例,该实例有个属性,名为args,args是个元组,其中包含了该异常的提示信息: defsafe_float(obj):try: retval=float(obj)exceptValueError,e:print'type of e is', type(e)print'e is', eprint'e.args is', e.args retval='could notc...
最顶层的是BaseException,它是所有异常类型的基类。常见的内置异常如ValueError、TypeError、FileNotFoundError等都继承自Exception类,而更严重的系统退出异常SystemExit、键盘中断异常KeyboardInterrupt则直接继承自BaseException。 理解并熟练掌握Python异常体系 ,有助于我们针对不同的异常类型编写针对性强、逻辑清晰的异常处理代...
如果需要捕获所有因错误而引起的异常,可以直接捕获Exception异常,Exception是绝大多数Python内建异常的基类。 但是对于SystemExit和KeyboardInterupt这两个异常,使用Exception是无法捕获的,因为它们不是Exception的继承者,原因很简单,因为这两个异常不是由于错误条件引起的。SystemExit是由于当前Python应用程序需要退出,KeyboardIn...
fileinfo = os.stat(fileName) file_size = int(fileinfo.st_size)/1024 return file_size except Exception as reason: print_ztp_log(f"Get file size failed. reason = {reason}", LOG_ERROR_TYPE) return file_size def get_file_size(file_path=''): """Return the size of a file in the ...
classBlock:def__enter__(self):print('entering to the block')returnselfdefprt(self, args):print('this is the block we do %s'% args)def__exit__(self,exc_type, exc_value, exc_tb):ifexc_typeisNone:print('exit normally without exception')else:print('found exception: %s, and detailed...
except Exception as E: raise TypeError('bad input') from E 1. 2. 3. 4. 执行的结果如下: Traceback (most recent call last): File "hh.py", line 2, in <module> 1/0 ZeroDivisionError: division by zero The above exception was the direct cause of the following exception: ...
可以抛出 Exception("异常信息"),Exception 是一个通用类型的异常。 此外,仅一个 raise 也能构成抛出异常的语句,这会将当前语句中已经捕获的异常再次抛出。 示例。 raise ZeroDivisionError("零不能做分母") # (11) # ZeroDivisionError: 零不能做分母 raise ZeroDivisionError # (12) # ZeroDivisionError raise Exc...
NameError: --func1 exception--定义: traceback.print_exception(etype, value, tb[, limit[, file]])与print_tb相比多了两个参数etype和value,分别是exception type和exception value,加上tb(traceback object),正好是sys.exc_info()返回的三个值 ...
The argument type of eachexceptblock indicates the type of exception that can be handled by it. For example, try: even_numbers = [2,4,6,8]print(even_numbers[5])exceptZeroDivisionError:print("Denominator cannot be 0.")exceptIndexError:print("Index Out of Bound.")# Output: Index Out of...
try: gail() except AlreadyGotOne: print('got exception') class Career(Exception): def __init__(self, job, *args, **kwargs): super(Career, self).__init__(*args, **kwargs) self._job = job def __str__(self): return 'So I became a waiter of {}'.format(self._job) raise ...