{
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   "source": [
    "# SW06 - Flipped Classroom  \n",
    "\n",
    "*This JupyterNotebook is intended to practice the theory alongside the slides and is used as a \"practical check of the theory input\". There are no sample solutions and the file will not be corrected and does not have to be submitted.*"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***  \n",
    "## Functions  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hoi\n",
      "Hoi\n",
      "Hoi\n",
      "Hoi\n"
     ]
    }
   ],
   "source": [
    "def print_word(word, n):\n",
    "    for _ in range(n):\n",
    "        print(word)\n",
    "\n",
    "print_word(\"Hoi\", 4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "'str' object cannot be interpreted as an integer",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "Cell \u001b[1;32mIn[2], line 2\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;66;03m#causes an error because parameter needs to fit\u001b[39;00m\n\u001b[1;32m----> 2\u001b[0m \u001b[43mprint_word\u001b[49m\u001b[43m(\u001b[49m\u001b[38;5;241;43m4\u001b[39;49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[38;5;124;43m\"\u001b[39;49m\u001b[38;5;124;43mhello\u001b[39;49m\u001b[38;5;124;43m\"\u001b[39;49m\u001b[43m)\u001b[49m\n",
      "Cell \u001b[1;32mIn[1], line 2\u001b[0m, in \u001b[0;36mprint_word\u001b[1;34m(word, n)\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mprint_word\u001b[39m(word, n):\n\u001b[1;32m----> 2\u001b[0m     \u001b[38;5;28;01mfor\u001b[39;00m _ \u001b[38;5;129;01min\u001b[39;00m \u001b[38;5;28;43mrange\u001b[39;49m\u001b[43m(\u001b[49m\u001b[43mn\u001b[49m\u001b[43m)\u001b[49m:\n\u001b[0;32m      3\u001b[0m         \u001b[38;5;28mprint\u001b[39m(word)\n",
      "\u001b[1;31mTypeError\u001b[0m: 'str' object cannot be interpreted as an integer"
     ]
    }
   ],
   "source": [
    "# causes an error because parameter needs to fit\n",
    "print_word(4, \"hello\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hej\n",
      "Hej\n",
      "Hej\n",
      "Hej\n",
      "Hej\n"
     ]
    }
   ],
   "source": [
    "# with paramter name - then it is working\n",
    "print_word(n=5, word=\"Hej\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hi\n",
      "hi\n",
      "hi\n"
     ]
    }
   ],
   "source": [
    "def say_hi(n=3, word=\"hi\"):\n",
    "    for _ in range(n):\n",
    "        print(word)\n",
    "\n",
    "say_hi()\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "olla\n",
      "olla\n",
      "olla\n",
      "olla\n",
      "olla\n"
     ]
    }
   ],
   "source": [
    "say_hi(5, \"olla\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***  \n",
    "### TypeHints  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n",
      "3.2\n"
     ]
    }
   ],
   "source": [
    "def say_hallo(n:int, word:str=\"Hallo\"):\n",
    "    for _ in range(n):\n",
    "        print(word)\n",
    "\n",
    "say_hallo(10, 3.2)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "111\n"
     ]
    }
   ],
   "source": [
    "def add_binary(a:int, b:int) -> str:\n",
    "    binary_sum = bin(a+b)[2:]\n",
    "    return binary_sum\n",
    "\n",
    "print(add_binary(5, 2))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***  \n",
    "###  docstring"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "205.0"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "def calc_rect_area(length:float, width:float):\n",
    "    \"\"\" \n",
    "    Calculate the Rectangle Area from a rectangle with width w and length l.\n",
    "    Parameters: \n",
    "        length (float) : Length of the Rectangle\n",
    "        width (float) : Width of the Rectangle\n",
    "    Returns:\n",
    "        rect_area (float) : rectangle area (length*width)\n",
    "    \"\"\"\n",
    "    rect_area = length * width\n",
    "    return rect_area\n",
    "\n",
    "# calling the function with two arguments\n",
    "calc_rect_area(10.0, 20.5)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "101\n"
     ]
    }
   ],
   "source": [
    "def add_binary(a, b):\n",
    "    '''\n",
    "    Returns the sum of two decimal numbers in binary digits.\n",
    "    Parameters: \n",
    "        a (int): A decimal integer\n",
    "        b (int): Another decimal integer\n",
    "    Returns:\n",
    "        binary_sum (str): Binary string of the sum of a and b\n",
    "    '''\n",
    "    binary_sum = bin(a+b)[2:]\n",
    "    return binary_sum\n",
    "\n",
    "print(add_binary(3, 2))\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***  \n",
    "### Validity - Scope Variables  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "25\n"
     ]
    }
   ],
   "source": [
    "def my_func(x):\n",
    "    y = x ** 2\n",
    "    return y\n",
    "\n",
    "print(my_func(5))\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'my_inner_func' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "Cell \u001b[0;32mIn[12], line 12\u001b[0m\n\u001b[1;32m      9\u001b[0m         my_inner_func()\n\u001b[1;32m     11\u001b[0m \u001b[38;5;66;03m# Achtung: my_inner_func nur in my_func sichtbar!\u001b[39;00m\n\u001b[0;32m---> 12\u001b[0m \u001b[43mmy_inner_func\u001b[49m(\u001b[38;5;241m5\u001b[39m)\n",
      "\u001b[0;31mNameError\u001b[0m: name 'my_inner_func' is not defined"
     ]
    }
   ],
   "source": [
    "# Global Scope\n",
    "x = 10\n",
    "def my_func():\n",
    "    ## Function Scope\n",
    "    y = 20\n",
    "    def my_inner_func():\n",
    "    ## inner Scope\n",
    "        z = 30\n",
    "        my_inner_func()\n",
    "\n",
    "# Achtung: my_inner_func nur in my_func sichtbar!\n",
    "my_inner_func()\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***  \n",
    "### Activation exercises  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "10\n"
     ]
    }
   ],
   "source": [
    "x = 10\n",
    "def my_func_2(y):\n",
    "    x = y * 10\n",
    "    return x\n",
    "\n",
    "\n",
    "my_func_2(1)\n",
    "print(x)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "10\n"
     ]
    }
   ],
   "source": [
    "x = 10\n",
    "def my_func_2(y):\n",
    "    x = y * 10\n",
    "    return x\n",
    "\n",
    "my_func_2(1)\n",
    "print(x)"
   ]
  }
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