Created
October 6, 2015 10:32
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| { | |
| "cells": [ | |
| { | |
| "cell_type": "code", | |
| "execution_count": null, | |
| "metadata": { | |
| "collapsed": true | |
| }, | |
| "outputs": [], | |
| "source": [ | |
| "from collections import namedtuple\n", | |
| "User = namedtuple('User', [\"id\", \"name\", \"email\"])\n", | |
| "someone = User(1, \"Some Body\", \"[email protected]\")" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": null, | |
| "metadata": { | |
| "collapsed": true | |
| }, | |
| "outputs": [], | |
| "source": [ | |
| "import json, sqlalchemy\n", | |
| "\n", | |
| "connection_string = 'sqlite://'\n", | |
| "db = sqlalchemy.create_engine(connection_string)\n", | |
| "engine = db.connect()\n", | |
| "meta = sqlalchemy.MetaData(engine)\n", | |
| "\n", | |
| "columns = (\n", | |
| " sqlalchemy.Column('id', sqlalchemy.Integer),\n", | |
| " sqlalchemy.Column('name', sqlalchemy.Text),\n", | |
| " sqlalchemy.Column('email', sqlalchemy.Text),\n", | |
| ")\n", | |
| "\n", | |
| "sqlalchemy.Table(\"users\", meta, *columns)\n", | |
| "meta.create_all()\n", | |
| "\n", | |
| "table = sqlalchemy.table(\"users\", *columns)" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": null, | |
| "metadata": { | |
| "collapsed": false | |
| }, | |
| "outputs": [], | |
| "source": [ | |
| "# add test data\n", | |
| "statements = [\n", | |
| " table.insert().values(user)\n", | |
| " for user in (\n", | |
| " User(1, \"Alice\", \"[email protected]\"),\n", | |
| " User(2, \"Bob\", \"[email protected]\"),\n", | |
| " (3, \"Chuck\", \"[email protected]\"),\n", | |
| " (4, \"Diane\", \"[email protected]\"),\n", | |
| " )\n", | |
| "]\n", | |
| "results = [engine.execute(stmt) for stmt in statements]" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": null, | |
| "metadata": { | |
| "collapsed": false | |
| }, | |
| "outputs": [], | |
| "source": [ | |
| "alice = engine.execute(table.select().where(table.c.name == \"Alice\")).fetchone()\n", | |
| "print(\"User: {}\".format(alice[1]))" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": null, | |
| "metadata": { | |
| "collapsed": false | |
| }, | |
| "outputs": [], | |
| "source": [ | |
| "tuple_alice = User(*alice)\n", | |
| "print(\"User: {}\".format(tuple_alice.name))\n", | |
| "# User: Alice\n", | |
| "print(alice)\n", | |
| "# (1, 'Alice', '[email protected]')\n", | |
| "print(tuple_alice)\n", | |
| "# User(id=1, name='Alice', email='[email protected]')" | |
| ] | |
| } | |
| ], | |
| "metadata": { | |
| "kernelspec": { | |
| "display_name": "Python 3", | |
| "language": "python", | |
| "name": "python3" | |
| }, | |
| "language_info": { | |
| "codemirror_mode": { | |
| "name": "ipython", | |
| "version": 3 | |
| }, | |
| "file_extension": ".py", | |
| "mimetype": "text/x-python", | |
| "name": "python", | |
| "nbconvert_exporter": "python", | |
| "pygments_lexer": "ipython3", | |
| "version": "3.5.0" | |
| } | |
| }, | |
| "nbformat": 4, | |
| "nbformat_minor": 0 | |
| } |
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