一、使用try、except、else、finally块 在Python中,try块用于包裹可能引发异常的代码,如果发生异常,程序控制流会转到相应的except块。else块用于在没有发生任何异常时执行代码,而finally块无论是否发生异常,都会执行。 示例代码: def divide_numbers(a, b): try: result = a / b
在函数内部,我们使用了try-except语句来捕获ZeroDivisionError异常。如果在计算过程中,除数为零,则会触发该异常。然而,我们并不想终止程序的运行,而是希望捕获该异常后,重新抛出TypeError异常,以表示出现了错误。这样,程序就能继续运行下去。 总结 rethrow Exception是Python中一个非常有用的特性,它可以帮助我们在遇到异常...
This statement is employed to rethrow the caught exception, preserving its original type and message that ensures that the exception propagates up the call stack. The example usage outside the process_data function demonstrates how to catch the rethrown exception in a try-except block. In this ...
try:# 触发 ValueErrorint('Python')except ValueError as ve:print(f'ValueError: {ve}')try:# 触发 ZeroDivisionErrorx = 1 / 0except ZeroDivisionError as zde:print(f'ZeroDivisionError: {zde}')try:# 触发 FileNotFoundErrorwith open('non_existent_file.txt', 'r') as f:content = f.read()excep...
try: do_something_dangerous() except: do_something_to_apologize() raise Here the raise statement means, “throw the exception last caught”. This is a simple case, and I probably didn’t need to remind you of it. But a more sophisticated technique is to catch an exception in one place...
这个：var didFail = false;try { startDownload()} catch (e) { didFail = true; downlo...
导致python在任何线程出现异常时退出你可以简单地在你的线程中抛出一个错误，让主线程处理并报告这个错误...
file doesn't exist and # rethrow it as something more descriptive. try: if ex.args[2].decode("utf-8").find("OSError: [Errno 2] ENOENT") != -1: raise RuntimeError("No such file: {0}".format(filename)) else: raise ex except UnicodeDecodeError: raise ex self._pyboard.exit_raw_...
_pyboard.enter_raw_repl() try: out = self._pyboard.exec_(textwrap.dedent(command)) except PyboardError as ex: message = ex.args[2].decode("utf-8") # Check if this is an OSError #2, i.e. file/directory doesn't exist # and rethrow it as something more descriptive. if message....
# pythontry:number=int(21)assertnumber%2==0except:print("It is not a even number!")else:reciprocal=1/numberprint(reciprocal) Output: As you can see from the above example, if the entered number is even, then the program outputs the reciprocal of the number, and if the number is not...