Message 273242 - Python tracker

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Author	ncoghlan
Recipients	SilentGhost, barry, mb_, ncoghlan, rhettinger, yselivanov
Date	2016-08-20.19:18:22
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1471720703.55.0.995759162337.issue27814@psf.upfronthosting.co.za>
In-reply-to

Content
contextlib.suppress provides a contextmanager spelling for the following pattern: try: <body> except <expr>: pass That's a very common pattern worth having in the standard library, even though it's only a 5 line context manager. The proposed API change would make it instead an implementation of the vastly less common pattern: try: <body> except <unless-expr>: raise except <expr>: pass For the use case you're discussing (trying to shut down, potentially failing, but also not wanting to hide genuine programming errors), I'd be more amenable to introducing a comparable context manager to the logging module that, instead of silently ignoring caught exceptions, logged them, and also allowed you to restrict which exceptions were logged.

contextlib.suppress provides a contextmanager spelling for the following pattern:

    try:
        <body>
    except <expr>:
        pass

That's a very common pattern worth having in the standard library, even though it's only a 5 line context manager.

The proposed API change would make it instead an implementation of the vastly *less* common pattern:

    try:
        <body>
    except <unless-expr>:
        raise
    except <expr>:
        pass

For the use case you're discussing (trying to shut down, potentially failing, but also not wanting to hide genuine programming errors), I'd be more amenable to introducing a comparable context manager to the logging module that, instead of silently ignoring caught exceptions, logged them, and also allowed you to restrict which exceptions were logged.

History
Date	User	Action	Args
2016-08-20 19:18:23	ncoghlan	set	recipients: + ncoghlan, barry, rhettinger, SilentGhost, yselivanov, mb_
2016-08-20 19:18:23	ncoghlan	set	messageid: <1471720703.55.0.995759162337.issue27814@psf.upfronthosting.co.za>
2016-08-20 19:18:23	ncoghlan	link	issue27814 messages
2016-08-20 19:18:22	ncoghlan	create