File"<stdin>", line 1,in<module>File"<stdin>", line 2,infetcher IndexError: string index out of range>>> 3.2 捕获异常 (Catching Exceptions) 很多时候,我们并不希望执行默认的异常行为,而是即便异常发生之后,我们的代码还能继续运行下去。这样,我们可以自己捕获异常。例如: $ python Python2.7.6 (defa...
because Python detects errors automatically, your code usually doesn’t need to check for errors in the first place. The upshot is that exceptions let you largely ignore the unusual cases and avoid error-checking code.
In the above example, if the file does not exist, Python raises a FileNotFoundError. This error is caught by the except block, and an error message is printed. After handling the exception, the program continues its execution, as indicated by the message “Program continues…”. Catching an...
If none of the statements in thetryblock generates an exception, theexceptblock is skipped. Catching Specific Exceptions in Python For eachtryblock, there can be zero or moreexceptblocks. Multipleexceptblocks allow us to handle each exception differently. The argument type of eachexceptblock indicat...
You may have noticed that, while we’re catching exceptions on the top level, we may not want to handle all exceptions the same way. Say, for some reason, we are okay with just logging an error ifsavefails. But if restarting a host fails, maybe we want to retry, or to “nack” ...
Catching Multiple Exceptions Handle different error types using multipleexceptclauses. multiple_errors.py def process_data(value): try: num = int(value) print(100 / num) except ValueError: print("Invalid integer conversion") except ZeroDivisionError: ...
If you're catching an exception in Python and you would like access to the actual exception object that was being raised, you can use the as keyword in your except block. Mark as read A Python tip every week Need to fill-in gaps in your Python skills? Sign up for my Python newslett...
Instead of except*, the backport uses an exceptiongroup.catch() context manager to handle multiple errors. You can learn more about catching multiple exceptions in How to Catch Multiple Exceptions in Python.Remove ads Asynchronous Task Groups in Python 3.11 You learned about exception groups in ...
Bug report Bug description: When an ExceptionGroup is implicitly constructed by catching a naked exception in an except* block, the traceback of the ExceptionGroup seems to point to the stackframe above where it is logically created: def...
Python中的TypeError:捕获未继承自BaseException的类 1. 解释TypeError异常的含义 在Python中,TypeError是一种内置的异常类型,表示在执行某个操作时,其类型与期望的不符。当你尝试捕获一个未继承自BaseException的类作为异常时,Python会抛出TypeError,提示“catching classes that do not inherit from BaseException is no...