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Quant Pythonista wrote a new blog post titled Don’t sell on Amazon
Selling your stuff on Amazon is a losing game, and I don’t recommend that you do it. Let me tell you what happened to me recently. I wasn’t using my iPad so I decided to sell it on Amazon. Boom, sold. February 10 it sells, I ship with Shyp same day. 23 days later, the […]
1632 days ago
Quant Pythonista wrote a new blog post titled What’s changed
I turned 30 on Friday. I threw a party. Nearly all my favorite people in the Bay Area (with some exceptions, travel and life and so forth) came to wish me well and be merry. It was wonderful. The decade I just completed has been quite the personal journey, with growth and change in my […]
1639 days ago
Quant Pythonista wrote a new blog post titled Thoughts on joining Cloudera
After some unanticipated media leaks (here and here), I was very excited to finally share that my team and I are joining Cloudera. You can find out all the concrete details in those articles, but I wanted to give a …Read more »
1807 days ago
Quant Pythonista wrote a new blog post titled Strata NYC 2013 and PyData 2013 Talks
I was excited to be able to talk at two recent data-centric conferences in New York. They touch on some related subjects, with the PyData talk being a lot more technical and having to do with low-level architecture in pandas …Read more »
2137 days ago
Quant Pythonista wrote a new blog post titled PyCon Singapore 2013
I was graciously invited to give the keynote presentation at this year’s PyCon Singapore. Luckily, I love to hack on long plane rides. See the slides from the talk below. I showed some analytics on Python posts on Stackoverflow during …Read more »
2285 days ago
Quant Pythonista wrote a new blog post titled I’m moving to San Francisco. And hiring
PyCon and PyData 2013 were a blast this last week. Several people noted that my GitHub activity on pandas hasn’t quite been the same lately and wondered if I was getting a little burned out. I’m happy to say quite …Read more »
2370 days ago
Quant Pythonista wrote a new blog post titled Whirlwind tour of pandas in 10 minutes
10-minute tour of pandas from Wes McKinney on Vimeo.
2409 days ago
Quant Pythonista wrote a new blog post titled Update on upcoming pandas v0.10, new file parser, other performance wins
We’re hard at work as usual getting the next major pandas release out. I hope you’re as excited as I am! An interesting problem came up recently on the ever-popular FEC Disclosure database used in my book and in many …Read more »
2472 days ago
Quant Pythonista wrote a new blog post titled A new high performance, memory-efficient file parser engine for pandas
TL;DR I’ve finally gotten around to building the high performance parser engine that pandas deserves. It hasn’t been released yet (it’s in a branch on GitHub) but will after I give it a month or so for any remaining buglets …Read more »
2539 days ago
Quant Pythonista wrote a new blog post titled Requirements for EuroSciPy 2012 pandas tutorial
Much belatedly, here are the requirements for the EuroSciPy tutorial on pandas in Brussels tomorrow. They are the same as for the SciPy 2012 (Austin) tutorial: NumPy 1.6.1 or higher matplotlib 1.0 or higher IPython 0.13 or higher, HTML notebook …Read more »
2581 days ago
Quant Pythonista wrote a new blog post titled Finally, GitHub listens! The importance of attention to detail in UX
I like using GitHub, as do apparently a lot of other people. When doing pull requests, I’ve been annoyed for a long time by the amount of clicking necessary to get the git URL to the contributor’s repository (which must …Read more »
2620 days ago
Quant Pythonista wrote a new blog post titled Latest Table of Contents for Python for Data Analysis
Making some progress on Python for Data Analysis
2640 days ago
Quant Pythonista wrote a new blog post titled Intro to Python for Financial Data Analysis at General Assembly
I taught a class this past Monday, June 18, at General Assembly. Here are the (very brief) slides and a link to the IPython notebooks. You’ll need at least pandas 0.8.0b2, though unfortunately I identified a few bugs during the …Read more »
2643 days ago
Quant Pythonista wrote a new blog post titled Easy, high performance time zone handling in pandas 0.8.0
Making time zone handling palatable is surprisingly difficult to get right. The generally agreed-upon “best practice” for storing timestamps is to use UTC. Otherwise, you have to worry about daylight savings time ambiguities or non-existent times. The misery of time …Read more »
2660 days ago
Quant Pythonista wrote a new blog post titled Mastering high performance data algorithms I: Group By
I’m on my way back from R/Finance 2012. Those guys did a nice job of organizing the conference and was great to meet everyone there. As part of pandas development, I have had to develop a suite of high performance …Read more »
2683 days ago
Quant Pythonista wrote a new blog post titled A O(n log n) NA-friendly “as of” array operations
In time series data, it’s fairly common to need to compute the last known value “as of” a particular date. However, missing data is the norm, so it’s a touch more complicated than doing a simple binary search. Here is …Read more »
2692 days ago
Quant Pythonista wrote a new blog post titled Why I’m not on the Julia bandwagon (yet)
I apologize in advance for writing what might be the first neutral to negative article about Julia that you’ve read. For those of you who don’t know, Julia is a new dynamic language with an LLVM-based JIT compiler designed for …Read more »
2693 days ago
Quant Pythonista wrote a new blog post titled The need for an embedded array expression compiler for NumPy
Yesterday I found myself adding some additional Cython methods for doing fast grouped aggregations in pandas. To my disappointment, I found myself duplicating a lot of code and not having much alternative beyond cooking up some kind of ad hoc …Read more »
2711 days ago
Quant Pythonista wrote a new blog post titled vbench Lightning Talk Slides from PyCon 2012
I prepared this lightning talk for PyCon on vbench, my performance monitoring tool, but didn’t have a chance to give it. If I get energetic I might make a screencast of it, but here are the slides: vbench: lightweight performance …Read more »
2738 days ago
Quant Pythonista wrote a new blog post titled Contingency tables and cross-tabulations in pandas
Someone recently asked me about creating cross-tabulations and contingency tables using pandas. I wrote a bit about this in October after implementing the pivot_table function for DataFrame. So I thought I would give a few more examples and show R …Read more »
2738 days ago