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wcrichton's profile
Will Crichton
Will Crichton
Will Crichton
@wcrichton

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Will Crichton

@wcrichton

Articulating the ineffable. Programming language theory 🤝 cognitive psychology. PhD @Stanford

he/him
willcrichton.net
Joined September 2011

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    1. Will Crichton‏ @wcrichton 15 Jul 2020

      Pandas is such a unique learning experience. It's the only tool where my mental model changes substantively every time I use it. Yet, I find Pandas hard to "properly" learn because all the tutorials are boring stock market examples.

      1 reply 1 retweet 10 likes
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    2. Will Crichton‏ @wcrichton 15 Jul 2020

      There's infinite cases where I can articulate the high-level task, and have no idea how to accomplish it without a for loop & iterrows.

      2 replies 0 retweets 1 like
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    3. Will Crichton‏ @wcrichton 15 Jul 2020

      Like today, I wanted to filter outliers within a group defined by two columns. Found an SO post about doing this within a single-column group. It used a novel mechanism (broadcasting between dataframes of different sizes) and I kept failing to transfer the example to my task.

      2 replies 0 retweets 2 likes
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    4. Will Crichton‏ @wcrichton 15 Jul 2020

      Maybe Pandas is just overly complex. I liked @yifanwu's example of 8 different ways to filter a dataframe.pic.twitter.com/J3xLfiVHeG

      3 replies 0 retweets 6 likes
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    5. Aldrin‏ @drin_montana 15 Jul 2020
      Replying to @wcrichton @yifanwu

      but... the top left 3 bullets are the exact same as the top right 3 bullets, it's just a preference on how you access a column of a data frame (not actually how you filter)

      1 reply 0 retweets 1 like
      Will Crichton‏ @wcrichton 15 Jul 2020
      Replying to @drin_montana @yifanwu

      In the context of the paper, Yifan was comparing these to "SELECT a FROM df WHERE a > 3", to make the point that SQL offers a single way to do this while pandas has many. But the 8 points definitely come from a combinatorial explosion of fewer choices.

      10:04 PM - 15 Jul 2020
      1 reply 0 retweets 0 likes
        1. Aldrin‏ @drin_montana 15 Jul 2020
          Replying to @wcrichton @yifanwu

          mm, I see the essence of it, I just think it's a bit misleading, or oversimplified. I definitely recognize that the .loc and .iloc attributes are confusing and I think that's a better example rather than `df[...] ` vs `df._` anyways, the essence is a reasonable point

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