exercises/week-1-exercise.ipynb

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   "source": [
    "## Week 1"
   ]
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   "source": [
    "### Exercise 1:\n",
    "Write a function that receives a list as parameter and return how many elements it has; if it doesn't have any element return an error."
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Solution 1:"
   ]
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   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Your code goes here"
   ]
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   "cell_type": "code",
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   "outputs": [],
   "source": [
    "def list_size(my_list):\n",
    "    size = len(my_list)\n",
    "    if (size > 0):\n",
    "        return f\"List have {size} elements.\"\n",
    "    return \"Error! No elements.\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'List have 6 elements.'"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "tuba_s_list = [1, 2, 3, \"a\", \"b\", \"c\"]\n",
    "list_size(tuba_s_list)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Error! No elements.'"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "empty_list = []\n",
    "list_size(empty_list)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2:\n",
    "Write a function that receives a string as parameter and return the number of each character in it."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Your code goes here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "from collections import Counter\n",
    "\n",
    "def string_char(my_string):\n",
    "    result = Counter(my_string).most_common(len(my_string))\n",
    "    return result"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[('i', 3),\n",
       " ('s', 3),\n",
       " (' ', 3),\n",
       " ('T', 1),\n",
       " ('h', 1),\n",
       " ('a', 1),\n",
       " ('t', 1),\n",
       " ('r', 1),\n",
       " ('n', 1),\n",
       " ('g', 1),\n",
       " ('.', 1)]"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "yasemin_s_string = \"This is a string.\"\n",
    "string_char(yasemin_s_string)"
   ]
  }
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