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authoryum <yum.food.vr@gmail.com>2023-01-23 14:28:53 -0800
committeryum <yum.food.vr@gmail.com>2023-01-23 14:32:09 -0800
commit9fff496394dcd94c4084694ca96a5e07ab836274 (patch)
treed89b78e16ecb6011bdd74555da79f7a8c1d90752 /FOSS/Python/Dependencies/future-0.18.2/docs/notebooks/object special methods (next, bool, ...).ipynb
parent9329d64f991b8b3289af22e4c2eedb09a97c5640 (diff)
package.ps1 now fetches all dependencies
Don't literally check in Python since it looks dodgy (rightfully so). Instead the build script just fetches it. * Update README, simplifying language and documenting other projects
Diffstat (limited to 'FOSS/Python/Dependencies/future-0.18.2/docs/notebooks/object special methods (next, bool, ...).ipynb')
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@@ -1,246 +0,0 @@
-{
- "metadata": {
- "name": ""
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "``object`` special methods"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import sys\n",
- "sys.version"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 1,
- "text": [
- "'2.7.6 (default, Mar 22 2014, 22:59:56) \\n[GCC 4.8.2]'"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "from builtins import object"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 2
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "object??"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 2
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "# Py3-style iterators written as new-style classes (subclasses of\n",
- "# future.builtins.object) are backward compatibile with Py2:\n",
- "class Upper(object):\n",
- " def __init__(self, iterable):\n",
- " self._iter = iter(iterable)\n",
- " def __next__(self): # note the Py3 interface\n",
- " return next(self._iter).upper()\n",
- " def __iter__(self):\n",
- " return self"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 3
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "assert list(Upper('hello')) == list('HELLO')"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 5
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "class AllOrNothing(object):\n",
- " def __init__(self, l):\n",
- " self.l = l\n",
- " def __bool__(self):\n",
- " return all(self.l)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 6
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "container = AllOrNothing([0, 100, 200])\n",
- "bool(container)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 8,
- "text": [
- "False"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "container2 = AllOrNothing([-100, 100, 200])\n",
- "bool(container2)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 9,
- "text": [
- "True"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "Classes derived from Python builtins don't have this behaviour:"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "class AllOrNothingBroken(list):\n",
- " def __bool__(self):\n",
- " print('Called!')\n",
- " return all(self)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 13
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "container3 = AllOrNothingBroken([0, 1, 2])\n",
- "bool(container3)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 14,
- "text": [
- "True"
- ]
- }
- ],
- "prompt_number": 14
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "But subclasses of ``future`` types do:"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "from builtins import list\n",
- "\n",
- "class AllOrNothingFixed(list):\n",
- " def __bool__(self):\n",
- " print('Called!')\n",
- " return all(self)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [],
- "prompt_number": 15
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "container4 = AllOrNothingFixed([0, 1, 2])\n",
- "bool(container4)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 17,
- "text": [
- "True"
- ]
- }
- ],
- "prompt_number": 17
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [],
- "language": "python",
- "metadata": {},
- "outputs": []
- }
- ],
- "metadata": {}
- }
- ]
-}