Add my answers to the movescheme examples

ops_intro_usage/exercise_answers.ipynb

+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "import openpathsampling as paths\n",
+    "import openpathsampling.high_level.move_strategy as strategies"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "?strategies.OneWayShootingStrategy"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Exercise 2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "ename": "NameError",
+     "evalue": "name 'scheme' is not defined",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
+      "\u001b[0;32m<ipython-input-9-cf5e445cef40>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mscheme\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mappend\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mstrategies\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mOneWayShootingStrategy\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
+      "\u001b[0;31mNameError\u001b[0m: name 'scheme' is not defined"
+     ]
+    }
+   ],
+   "source": [
+    "scheme.append(strategies.SelectedPairsRepExStrategy(ensembles=[ensemble_0, ensemble_2], replace=True))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Exercise 3"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "# build strategy except for shooting\n",
+    "scheme.append([\n",
+    "    strategies.NearestNeighborRepExStrategy(),\n",
+    "    strategies.PathReversalStrategy(),\n",
+    "    strategies.MinusMoveStrategy(engine=None),\n",
+    "    strategies.OrganizeByMoveGroupStrategy()\n",
+    "])\n",
+    "# add shooting movers\n",
+    "scheme.append(strategies.OneWayShootingStrategy(ensembles=ensemble_0, group=\"shoot_0\"))\n",
+    "scheme.append(strategies.OneWayShootingStrategy(ensembles=ensemble_1, group=\"shoot_1\"))\n",
+    "scheme.append(strategies.OneWayShootingStrategy(ensembles=ensemble_2, group=\"shoot_2\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Exercise 4"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "shooter_0 = paths.OneWayShootingMover(ensemble=ensemble_0,\n",
+    "                                      selector=paths.UniformSelector(),\n",
+    "                                      engine=None)\n",
+    "shooter_1 = paths.OneWayShootingMover(ensemble=ensemble_1,\n",
+    "                                      selector=paths.UniformSelector(),\n",
+    "                                      engine=None)\n",
+    "shooter_2 = paths.OneWayShootingMover(ensemble=ensemble_2,\n",
+    "                                      selector=paths.UniformSelector(),\n",
+    "                                      engine=None)\n",
+    "shooting_chooser = paths.RandomChoiceMover(movers=[shooter_0, shooter_1, shooter_2])\n",
+    "scheme = paths.LockedMoveScheme(shooting_chooser, network)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.12"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 1
+}