Author ncoghlan
Recipients Julian, eric.araujo, eric.snow, giampaolo.rodola, ncoghlan, nikratio, pitrou, rhettinger, smarnach
Date 2011-12-22.12:23:15
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Message-id <1324556596.68.0.701521354797.issue13585@psf.upfronthosting.co.za>
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The comparison to Go's defer statement is interesting, though: ContextStack.register basically *is* the same as defer. While a nested with statement is a better option in Python, if we ignore that for the moment, you *could* write that simply copying example:

    with ContextStack() as stack:
        src = open(source)
        stack.register(src.close)
        dest = open(destination, 'w')
        stack.register(dest.close)
        copy(src, dest)

However, since ContextStack is just an ordinary context manager class, you have a lot of flexibility in what you do with it (particularly once I add the preserve() API to let you deliberately *skip* the cleanup steps by transferring them to a new ContextStack object)
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Date User Action Args
2011-12-22 12:23:16ncoghlansetrecipients: + ncoghlan, rhettinger, pitrou, giampaolo.rodola, eric.araujo, nikratio, Julian, eric.snow, smarnach
2011-12-22 12:23:16ncoghlansetmessageid: <1324556596.68.0.701521354797.issue13585@psf.upfronthosting.co.za>
2011-12-22 12:23:16ncoghlanlinkissue13585 messages
2011-12-22 12:23:15ncoghlancreate