add some functions

.gitignore

@@ -263,3 +263,6 @@ _doc/notebooks/hackathon_2015/*.csv
 _doc/notebooks/hackathon_2015/*.xlsx
 _doc/notebooks/hackathon_2015/stojou
 
+_doc/notebooks/cheat_sheets/essai.utf8.txt
+_doc/notebooks/cheat_sheets/essai.txt
+_doc/notebooks/hackathon_2015/croix-rouge.db3

_doc/notebooks/cheat_sheets/chsh_files.ipynb

@@ -0,0 +1,239 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Around files"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<b>Plan</b>\n",
+       "<div id=\"my_menu_id\">run previous cell, wait for 2 seconds</div>\n",
+       "<script>\n",
+       "function repeat_indent_string(n){\n",
+       "    var a = \"\" ;\n",
+       "    for ( ; n > 0 ; --n) {\n",
+       "        a += \"    \";\n",
+       "    }\n",
+       "    return a;\n",
+       "}\n",
+       "var update_menu_string = function(begin, lfirst, llast, sformat, send) {\n",
+       "    var anchors = document.getElementsByClassName(\"section\");\n",
+       "    if (anchors.length == 0) {\n",
+       "        anchors = document.getElementsByClassName(\"text_cell_render rendered_html\");\n",
+       "    }\n",
+       "    var i,t;\n",
+       "    var text_menu = begin;\n",
+       "    var text_memo = \"<pre>\\nlength:\" + anchors.length + \"\\n\";\n",
+       "    var ind = \"\";\n",
+       "    var memo_level = 1;\n",
+       "    var href;\n",
+       "    var tags = [];\n",
+       "    for (i = 0; i <= llast; i++) {\n",
+       "        tags.push(\"h\" + i);\n",
+       "    }\n",
+       "\n",
+       "    for (i = 0; i < anchors.length; i++) {\n",
+       "        text_memo += \"**\" + anchors[i].id + \"--\\n\";\n",
+       "\n",
+       "        var child = null;\n",
+       "        for(t = 0; t < tags.length; t++) {\n",
+       "            var r = anchors[i].getElementsByTagName(tags[t]);\n",
+       "            if (r.length > 0) {\n",
+       "child = r[0];\n",
+       "break;\n",
+       "            }\n",
+       "        }\n",
+       "        if (child == null){\n",
+       "            text_memo += \"null\\n\";\n",
+       "            continue;\n",
+       "        }\n",
+       "\n",
+       "        if (anchors[i].hasAttribute(\"id\")) {\n",
+       "            // when converted in RST\n",
+       "            href = anchors[i].id;\n",
+       "            text_memo += \"#1-\" + href;\n",
+       "            // passer à child suivant (le chercher)\n",
+       "        }\n",
+       "        else if (child.hasAttribute(\"id\")) {\n",
+       "            // in a notebook\n",
+       "            href = child.id;\n",
+       "            text_memo += \"#2-\" + href;\n",
+       "        }\n",
+       "        else {\n",
+       "            text_memo += \"#3-\" + \"*\" + \"\\n\";\n",
+       "            continue;\n",
+       "        }\n",
+       "        var title = child.textContent;\n",
+       "        var level = parseInt(child.tagName.substring(1,2));\n",
+       "\n",
+       "        text_memo += \"--\" + level + \"?\" + lfirst + \"--\" + title + \"\\n\";\n",
+       "\n",
+       "        if ((level < lfirst) || (level > llast)) {\n",
+       "            continue ;\n",
+       "        }\n",
+       "        if (title.endsWith('¶')) {\n",
+       "            title = title.substring(0,title.length-1).replace(\"<\", \"&lt;\").replace(\">\", \"&gt;\").replace(\"&\", \"&amp;\")\n",
+       "        }\n",
+       "\n",
+       "        if (title.length == 0) {\n",
+       "            continue;\n",
+       "        }\n",
+       "        while (level > memo_level) {\n",
+       "            text_menu += \"<ul>\\n\";\n",
+       "            memo_level += 1;\n",
+       "        }\n",
+       "        while (level < memo_level) {\n",
+       "            text_menu += \"</ul>\\n\";\n",
+       "            memo_level -= 1;\n",
+       "        }\n",
+       "        text_menu += repeat_indent_string(level-2) + sformat.replace(\"__HREF__\", href).replace(\"__TITLE__\", title);\n",
+       "    }\n",
+       "    while (1 < memo_level) {\n",
+       "        text_menu += \"</ul>\\n\";\n",
+       "        memo_level -= 1;\n",
+       "    }\n",
+       "    text_menu += send;\n",
+       "    //text_menu += \"\\n\" + text_memo;\n",
+       "    return text_menu;\n",
+       "};\n",
+       "var update_menu = function() {\n",
+       "    var sbegin = \"\";\n",
+       "    var sformat = '<li><a href=\"#__HREF__\">__TITLE__</a></li>';\n",
+       "    var send = \"\";\n",
+       "    var text_menu = update_menu_string(sbegin, 2, 4, sformat, send);\n",
+       "    var menu = document.getElementById(\"my_menu_id\");\n",
+       "    menu.innerHTML=text_menu;\n",
+       "};\n",
+       "window.setTimeout(update_menu,2000);\n",
+       "            </script>"
+      ],
+      "text/plain": [
+       "<IPython.core.display.HTML object>"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import pyensae\n",
+    "%nb_menu"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## change the encoding of a file"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "with open(\"essai.txt\", \"w\", encoding=\"latin-1\") as f:\n",
+    "    f.write(\"ée\\nàà\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "1"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "from ensae_projects.data import change_encoding\n",
+    "change_encoding(\"essai.txt\", \"essai.utf8.txt\", enc1=\"latin-1\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "ée\n",
+      "àà\n"
+     ]
+    }
+   ],
+   "source": [
+    "with open(\"essai.utf8.txt\", \"r\", encoding=\"utf8\") as f:\n",
+    "    s = f.read()\n",
+    "print(s)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "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": "3.4.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}