kopia lustrzana https://github.com/simonw/datasette
141 wiersze
6.0 KiB
ReStructuredText
141 wiersze
6.0 KiB
ReStructuredText
Getting started
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===============
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.. _getting_started_demo:
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Play with a live demo
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---------------------
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The best way to experience Datasette for the first time is with a demo:
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* `global-power-plants.datasettes.com <https://global-power-plants.datasettes.com/global-power-plants/global-power-plants>`__ provides a searchable database of power plants around the world, using data from the `World Resources Institude <https://www.wri.org/publication/global-power-plant-database>`__ rendered using the `datasette-cluster-map <https://github.com/simonw/datasette-cluster-map>`__ plugin.
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* `fivethirtyeight.datasettes.com <https://fivethirtyeight.datasettes.com/fivethirtyeight>`__ shows Datasette running against over 400 datasets imported from the `FiveThirtyEight GitHub repository <https://github.com/fivethirtyeight/data>`__.
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.. _getting_started_tutorial:
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Follow a tutorial
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-----------------
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Datasette has several `tutorials <https://datasette.io/tutorials>`__ to help you get started with the tool. Try one of the following:
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- `Exploring a database with Datasette <https://datasette.io/tutorials/explore>`__ shows how to use the Datasette web interface to explore a new database.
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- `Learn SQL with Datasette <https://datasette.io/tutorials/learn-sql>`__ introduces SQL, and shows how to use that query language to ask questions of your data.
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- `Cleaning data with sqlite-utils and Datasette <https://datasette.io/tutorials/clean-data>`__ guides you through using `sqlite-utils <https://sqlite-utils.datasette.io/>`__ to turn a CSV file into a database that you can explore using Datasette.
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.. _getting_started_datasette_lite:
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Datasette in your browser with Datasette Lite
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---------------------------------------------
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`Datasette Lite <https://lite.datasette.io/>`__ is Datasette packaged using WebAssembly so that it runs entirely in your browser, no Python web application server required.
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You can pass a URL to a CSV, SQLite or raw SQL file directly to Datasette Lite to explore that data in your browser.
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This `example link <https://lite.datasette.io/?url=https%3A%2F%2Fraw.githubusercontent.com%2FNUKnightLab%2Fsql-mysteries%2Fmaster%2Fsql-murder-mystery.db#/sql-murder-mystery>`__ opens Datasette Lite and loads the SQL Murder Mystery example database from `Northwestern University Knight Lab <https://github.com/NUKnightLab/sql-mysteries>`__.
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.. _getting_started_glitch:
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Try Datasette without installing anything using Glitch
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------------------------------------------------------
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`Glitch <https://glitch.com/>`__ is a free online tool for building web apps directly from your web browser. You can use Glitch to try out Datasette without needing to install any software on your own computer.
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Here's a demo project on Glitch which you can use as the basis for your own experiments:
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`glitch.com/~datasette-csvs <https://glitch.com/~datasette-csvs>`__
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Glitch allows you to "remix" any project to create your own copy and start editing it in your browser. You can remix the ``datasette-csvs`` project by clicking this button:
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.. image:: https://cdn.glitch.com/2703baf2-b643-4da7-ab91-7ee2a2d00b5b%2Fremix-button.svg
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:target: https://glitch.com/edit/#!/remix/datasette-csvs
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Find a CSV file and drag it onto the Glitch file explorer panel - ``datasette-csvs`` will automatically convert it to a SQLite database (using `sqlite-utils <https://github.com/simonw/sqlite-utils>`__) and allow you to start exploring it using Datasette.
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If your CSV file has a ``latitude`` and ``longitude`` column you can visualize it on a map by uncommenting the ``datasette-cluster-map`` line in the ``requirements.txt`` file using the Glitch file editor.
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Need some data? Try this `Public Art Data <https://data.seattle.gov/Community/Public-Art-Data/j7sn-tdzk>`__ for the city of Seattle - hit "Export" and select "CSV" to download it as a CSV file.
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For more on how this works, see `Running Datasette on Glitch <https://simonwillison.net/2019/Apr/23/datasette-glitch/>`__.
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.. _getting_started_your_computer:
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Using Datasette on your own computer
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------------------------------------
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First, follow the :ref:`installation` instructions. Now you can run Datasette against a SQLite file on your computer using the following command:
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::
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datasette path/to/database.db
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This will start a web server on port 8001 - visit http://localhost:8001/
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to access the web interface.
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Add ``-o`` to open your browser automatically once Datasette has started::
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datasette path/to/database.db -o
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Use Chrome on OS X? You can run datasette against your browser history
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like so:
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::
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datasette ~/Library/Application\ Support/Google/Chrome/Default/History --nolock
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The ``--nolock`` option ignores any file locks. This is safe as Datasette will open the file in read-only mode.
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Now visiting http://localhost:8001/History/downloads will show you a web
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interface to browse your downloads data:
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.. figure:: https://static.simonwillison.net/static/2017/datasette-downloads.png
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:alt: Downloads table rendered by datasette
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http://localhost:8001/History/downloads.json will return that data as
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JSON:
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::
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{
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"database": "History",
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"columns": [
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"id",
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"current_path",
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"target_path",
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"start_time",
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"received_bytes",
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"total_bytes",
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...
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],
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"rows": [
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[
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1,
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"/Users/simonw/Downloads/DropboxInstaller.dmg",
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"/Users/simonw/Downloads/DropboxInstaller.dmg",
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13097290269022132,
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626688,
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0,
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...
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]
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]
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}
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http://localhost:8001/History/downloads.json?_shape=objects will return that data as
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JSON in a more convenient format:
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::
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{
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...
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"rows": [
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{
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"start_time": 13097290269022132,
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"interrupt_reason": 0,
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"hash": "",
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"id": 1,
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"site_url": "",
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"referrer": "https://www.dropbox.com/downloading?src=index",
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...
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}
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]
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}
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