Response to StackOverflow 33508377

StackOverflow33508377.ipynb

{
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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Response on StackOverflow:\n",
    "\n",
    "http://stackoverflow.com/questions/33508377/read-cell-content-in-an-ipython-notebook"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "from IPython.core.magic import Magics"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "from IPython.core.magic import  (\n",
    "    Magics, magics_class, cell_magic, line_magic\n",
    ")\n",
    "\n",
    "class B(dict):\n",
    "    def __getattr__(self, name):\n",
    "        return self.__getitem__(name)\n",
    "\n",
    "@magics_class\n",
    "class StoreSQL(Magics):\n",
    "\n",
    "    \n",
    "    def __init__(self, shell=None,  **kwargs):\n",
    "        super().__init__(shell=shell, **kwargs)\n",
    "        self._store = []\n",
    "        self._store2 = B()\n",
    "        # inject our store in user availlable namespace under __mystore\n",
    "        # name\n",
    "        shell.user_ns['__mystore'] = self._store\n",
    "        shell.user_ns['__mystore2'] = self._store2\n",
    "\n",
    "    @cell_magic\n",
    "    def sql(self, line, cell):\n",
    "        \"\"\"store the cell in the store\"\"\"\n",
    "        self._store.append(cell)\n",
    "\n",
    "    @cell_magic\n",
    "    def sqlnamed(self, line, cell):\n",
    "        \"\"\"store the cell in the store\"\"\"\n",
    "        self._store2[line.strip()] = cell\n",
    "\n",
    "        \n",
    "    @line_magic\n",
    "    def showsql(self, line):\n",
    "        \"\"\"show all recorded statements\"\"\"\n",
    "        print(self._store)\n",
    "        print(self._store2)\n",
    "                \n",
    "## use ipython load_ext mechanisme here if distributed\n",
    "get_ipython().register_magics(StoreSQL)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "b = B()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "b['A'] = 1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "b.A"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "%%sql \n",
    "select * from foo Where QUX Bar"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "%%sql\n",
    "Insert Cheezburger into Can_I_HAZ"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['select * from foo Where QUX Bar', 'Insert Cheezburger into Can_I_HAZ']\n",
      "{}\n"
     ]
    }
   ],
   "source": [
    "%showsql"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['select * from foo Where QUX Bar', 'Insert Cheezburger into Can_I_HAZ']"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "__mystore"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "%%sqlnamed X1\n",
    "this is sql2 cell X1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "%%sqlnamed thisIsFun\n",
    "this is sql2 cell Fun"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['select * from foo Where QUX Bar', 'Insert Cheezburger into Can_I_HAZ']\n",
      "{'X1': 'this is sql2 cell X1', 'thisIsFun': 'this is sql2 cell Fun'}\n"
     ]
    }
   ],
   "source": [
    "%showsql"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'this is sql2 cell X1'"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "__mystore2.X1"
   ]
  }
 ],
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