20211204_pyjamas_pydonts_2/talk_notebook.ipynb

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   "cell_type": "code",
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   "id": "c020a3b2",
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   "source": [
    "def swap_casing(string):\n",
    "    result = \"\"\n",
    "    for i in range(len(string)):\n",
    "        if string[i] == string[i].upper():\n",
    "            result += string[i].lower()\n",
    "        else:\n",
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   "cell_type": "code",
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    "# for i in range(len(string)):\n",
    "# range(len(...))\n",
    "\n",
    "def swap_casing(string):\n",
    "    result = \"\"\n",
    "    for char in string:\n",
    "        if char == char.upper():\n",
    "            result += char.lower()\n",
    "        else:\n",
    "            result += char.upper()\n",
    "    return result"
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  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "696abfb3",
   "metadata": {},
   "outputs": [],
   "source": [
    "def swap_casing(string):\n",
    "    result = \"\"\n",
    "    for char in string:\n",
    "        result += char.lower() if char.upper() == char else char.upper()\n",
    "    return result"
   ]
  },
  {
   "cell_type": "code",
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       "['isalnum',\n",
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     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "[attr for attr in dir(str) if attr.startswith(\"is\")]"
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  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "7b583e97",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
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     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "\"ADSAFDSF\".isupper()"
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  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "4089c55a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "\"a\".isupper()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "d9bae3fc",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
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   "source": [
    "\"A\".isupper()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "b27bcc42",
   "metadata": {},
   "outputs": [],
   "source": [
    "def swap_casing(string):\n",
    "    result = \"\"\n",
    "    for char in string:\n",
    "        result += char.lower() if char.isupper() else char.upper()\n",
    "    return result"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a569028d",
   "metadata": {},
   "outputs": [],
   "source": [
    "# lst = []\n",
    "# for elem in iterable:\n",
    "#     lst.append(func(elem))\n",
    "\n",
    "# ↓\n",
    "\n",
    "# lst = [func(elem) for elem in iterable]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "245e126e",
   "metadata": {},
   "outputs": [],
   "source": [
    "def swap_casing(string):\n",
    "    return \"\".join([\n",
    "        char.lower() if char.isupper() else char.upper() for char in string\n",
    "    ])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "9f2f2673",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'hELLO, wORLD!'"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "swap_casing(\"Hello, World!\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "38f0eff7",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['__add__',\n",
       " '__class__',\n",
       " '__contains__',\n",
       " '__delattr__',\n",
       " '__dir__',\n",
       " '__doc__',\n",
       " '__eq__',\n",
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       " '__getitem__',\n",
       " '__getnewargs__',\n",
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       " '__init__',\n",
       " '__init_subclass__',\n",
       " '__iter__',\n",
       " '__le__',\n",
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       " '__lt__',\n",
       " '__mod__',\n",
       " '__mul__',\n",
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       " '__new__',\n",
       " '__reduce__',\n",
       " '__reduce_ex__',\n",
       " '__repr__',\n",
       " '__rmod__',\n",
       " '__rmul__',\n",
       " '__setattr__',\n",
       " '__sizeof__',\n",
       " '__str__',\n",
       " '__subclasshook__',\n",
       " 'capitalize',\n",
       " 'casefold',\n",
       " 'center',\n",
       " 'count',\n",
       " 'encode',\n",
       " 'endswith',\n",
       " 'expandtabs',\n",
       " 'find',\n",
       " 'format',\n",
       " 'format_map',\n",
       " 'index',\n",
       " 'isalnum',\n",
       " 'isalpha',\n",
       " 'isascii',\n",
       " 'isdecimal',\n",
       " 'isdigit',\n",
       " 'isidentifier',\n",
       " 'islower',\n",
       " 'isnumeric',\n",
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       " 'istitle',\n",
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       " 'join',\n",
       " 'ljust',\n",
       " 'lower',\n",
       " 'lstrip',\n",
       " 'maketrans',\n",
       " 'partition',\n",
       " 'removeprefix',\n",
       " 'removesuffix',\n",
       " 'replace',\n",
       " 'rfind',\n",
       " 'rindex',\n",
       " 'rjust',\n",
       " 'rpartition',\n",
       " 'rsplit',\n",
       " 'rstrip',\n",
       " 'split',\n",
       " 'splitlines',\n",
       " 'startswith',\n",
       " 'strip',\n",
       " 'swapcase',\n",
       " 'title',\n",
       " 'translate',\n",
       " 'upper',\n",
       " 'zfill']"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dir(str)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "2d60d2ff",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on method_descriptor:\n",
      "\n",
      "swapcase(self, /)\n",
      "    Convert uppercase characters to lowercase and lowercase characters to uppercase.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(str.swapcase)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "ba948b98",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'hELLO, wORLD!'"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "\"Hello, World!\".swapcase()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "94989945",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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