一个块中的多个尝试代码 [英] Multiple try codes in one block

问题描述

我在 try 块中的代码有问题.为方便起见，这是我的代码:

I have a problem with my code in the try block. To make it easy this is my code:

try:
    code a
    code b #if b fails, it should ignore, and go to c.
    code c #if c fails, go to d
    code d
except:
    pass

这样的事情有可能吗?

推荐答案

你必须让这个单独 try块:

try:
    code a
except ExplicitException:
    pass

try:
    code b
except ExplicitException:
    try:
        code c
    except ExplicitException:
        try:
            code d
        except ExplicitException:
            pass

这假设您希望在 code b 失败时运行 code c only.

This assumes you want to run code c only if code b failed.

如果你需要运行code c不管，你需要一个接一个地放置try块:

If you need to run code c regardless, you need to put the try blocks one after the other:

try:
    code a
except ExplicitException:
    pass

try:
    code b
except ExplicitException:
    pass

try:
    code c
except ExplicitException:
    pass

try:
    code d
except ExplicitException:
    pass

我在这里使用 except ExplicitException 是因为盲目忽略所有异常绝不是一个好习惯.否则，您将忽略 MemoryError、KeyboardInterrupt 和 SystemExit-提出或有意识地处理这些问题.

I'm using except ExplicitException here because it is never a good practice to blindly ignore all exceptions. You'll be ignoring MemoryError, KeyboardInterrupt and SystemExit as well otherwise, which you normally do not want to ignore or intercept without some kind of re-raise or conscious reason for handling those.

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