6_classes.ipynb

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   "source": [
    "#class\n",
    "\n",
    "class Myclass:\n",
    "    \n",
    "    def __init__(self,a): #constructor\n",
    "        var=a\n",
    "        print(\"calling the constructors\")\n",
    "        \n",
    "    def hello(self):\n",
    "        print(\"inside the class and hello\")"
   ]
  },
  {
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   "metadata": {},
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     "name": "stdout",
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     "text": [
      "calling the constructors\n"
     ]
    }
   ],
   "source": [
    "obj=Myclass(2) #creating an instance/ object"
   ]
  },
  {
   "cell_type": "code",
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   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "__main__.Myclass"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "type(obj)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "inside the class and hello\n"
     ]
    }
   ],
   "source": [
    "obj.hello()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
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   "outputs": [],
   "source": [
    "#By default all the variables and the fucntions are public "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": true
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   "source": [
    "#use __ to specify that it is private\n",
    "\n",
    "class mypriv:\n",
    "    def __init__(self):\n",
    "        self.b=5\n",
    "        self.__a=3 #private variable\n",
    "        \n",
    "    \n",
    "    def hello(self):\n",
    "        print(\"hola!\")\n",
    "        print(self.__a)\n",
    "        "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": true
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   "outputs": [],
   "source": [
    "obj2=mypriv()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hola!\n",
      "3\n"
     ]
    }
   ],
   "source": [
    "obj2.hello()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'mypriv' object has no attribute '__a'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-13-81daf4f5ab58>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mobj2\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m__a\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m: 'mypriv' object has no attribute '__a'"
     ]
    }
   ],
   "source": [
    "obj2.__a"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "obj2.b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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