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dabeaz's profile
David Beazley
David Beazley
David Beazley
@dabeaz

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David Beazley

@dabeaz

Author of the Python Essential Reference and Python Cookbook. I tweet deep thoughts about code, bikes, kids, and stuff. Come to Chicago and take a course.

Chicago
dabeaz.com
Joined February 2009

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    David Beazley‏ @dabeaz 26 Nov 2019
    • Report Tweet

    Sure, you could use _ as a throw-away variable in a Python for-loop. Yeah, you could definitely do that... like everyone else. Or you could just do this: >>> a = [ (0, 'Hello'), (1, 'Satan') ] >>> for {}[()], x in a: ... print(x) ... Hello Satan >>> Be different.

    8:42 AM - 26 Nov 2019
    • 140 Retweets
    • 634 Likes
    • RJ Dan Neuman Cascading Style Stimson Atul Saurav Michal Fiedorowicz Jules JAYNE ARUNA NOAH Klaus-Dieter Warzecha Nyarmageddon
    51 replies 140 retweets 634 likes
      1. New conversation
      2. David Beazley‏ @dabeaz 26 Nov 2019
        • Report Tweet

        You can also mix things up... >>> for {}[(),...,()], x in a: ... print(x) ... Hello Satan >>>

        10 replies 5 retweets 50 likes
        Show this thread
      3. David Beazley‏ @dabeaz 27 Nov 2019
        • Report Tweet

        >>> a = [(0, 'Hello'), (1, 'Satan')] >>> for (lambda:()).foldl,x in a: ... print(x) ... Hello Satan >>>

        4 replies 1 retweet 18 likes
        Show this thread
      4. David Beazley‏ @dabeaz 27 Nov 2019
        • Report Tweet

        The key to good code is for it to look impressive.

        2 replies 5 retweets 44 likes
        Show this thread
      5. End of conversation
      1. David Beazley‏ @dabeaz 26 Nov 2019
        • Report Tweet

        For what it's worth, if you want to write code like this, you should take my compilers course ;-). A huge discussion (and design problem) centers around the concept of lvalue and rvalue expressions in assignment operations. This is a diabolical lvalue.

        4 replies 4 retweets 37 likes
        Show this thread
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      1. New conversation
      2. Baptiste Mispelon‏ @bmispelon 28 Nov 2019
        • Report Tweet
        Replying to @dabeaz

        I made sg "useful" with it: ᚐ = type('ᚐ',(object,),{'ᚐ':{},'__getattr__':lambda s,a:s.ᚐ[a],'__setattr__':lambda s,a,v:s.ᚐ.__setitem__(a,s.ᚐ[a]+v)if a in s.ᚐ else s.ᚐ.__setitem__(a,v)})() for ᚐ.i, ᚐ.s in [(600, 'sa'), (60, 'ta'), (6, 'n')]: pass print(ᚐ.i, ᚐ.s)

        1 reply 0 retweets 0 likes
      3. Baptiste Mispelon‏ @bmispelon 28 Nov 2019
        • Report Tweet
        Replying to @bmispelon @dabeaz

        Non-minified source code athttps://gist.github.com/bmispelon/739f5baae2d0ead8aa8de52884405c95 …

        1 reply 0 retweets 1 like
      4. 6 more replies
      1. New conversation
      2. Hazelnut‏ @HazelStones 26 Nov 2019
        • Report Tweet
        Replying to @dabeaz

        What sorcery is this?

        1 reply 0 retweets 12 likes
      3. David Beazley‏ @dabeaz 26 Nov 2019
        • Report Tweet
        Replying to @HazelStones

        Python.

        2 replies 0 retweets 12 likes
      4. 5 more replies
      1. New conversation
      2. Kelly Sovacool‏ @kelly_sovacool 26 Nov 2019
        • Report Tweet
        Replying to @dabeaz

        Thanks, I hate it.pic.twitter.com/Xuvuqe4I59

        1 reply 0 retweets 21 likes
      3. David Beazley‏ @dabeaz 26 Nov 2019
        • Report Tweet
        Replying to @kelly_sovacool

        It looks better from the other side of the monitor.

        0 replies 0 retweets 8 likes
      4. End of conversation

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