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Instant serverless APIs, powered by SQLite Simon Willison @simonw PyCon US 2019

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Serverless?

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Serverless Scale-to-zero

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Serverless Only pay for the computing resources you use. Scale-to-zero

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Stateless

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What if you ship static data as part of your app?

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Data Journalism

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A better way of publishing data?

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Datasette A tool for exploring and publishing data datasette.io

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Some handy features • Filtering and faceting • Custom SQL queries • JSON API to everything • Export table (or query results) as CSV

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The secret sauce is SQLite • Small, fast, ubiquitous • A database is a single file • Doesn’t scale well for writes… • … but who cares if your data is read-only? • Ship your data and code in the same container!

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pip install datasette (Python 3 only)

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find ~/Library -iname '*.sqlite*' \ -type f -exec du -h {} + | sort -r -h

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find ~/Library -iname '*.sqlite*' \ -type f -exec du -h {} + | sort -r -h

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CLSBusinessCategoryCache.db ?

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Creating SQLite databases

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csvs-to-sqlite

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csvs-to-sqlite \ SORP_2012.csv \ ohio.db

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https://glitch.com/edit/#!/datasette-csvs

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sqlite-utils

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Building a database of PyPI packages in Jupyter

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Publish it with Google Cloud Run

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datasette publish cloudrun \ /tmp/pypi.db \ --title="PyPI Top 1500 Packages" \ --name=pypi \ --install=datasette-vega \ --branch=master \ --extra-options="--cors" Thanks, Romain Primet!

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Let’s do something with that API

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https://glitch.com/edit/#!/pypi-top-1500-autocomplete Based on the technique described in https://24ways.org/2018/fast-autocomplete-search-for- your-website/

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Some more interesting projects

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Russian IRA ads https://simonwillison.net/2018/Aug/6/russian-facebook-ads/ Credit: Ed Summers, for cleaning the data

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Baltimore Salaries https://salaries.news.baltimoresun.com/ Credit: Carl Johnson, Baltimore Sun

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The world is full of interesting data…

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… let’s publish it in the most useful way possible

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simonwillison.net @simonw on Twitter