{
    "cells": [
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
       "# Data Visualization Notebook\n",
       "\n",
       "This notebook demonstrates how to visualize and analyze sales data using reusable functions."
      ]
     },
     {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {},
      "outputs": [],
      "source": [
       "import pandas as pd\n",
       "import matplotlib.pyplot as plt\n",
       "import seaborn as sns"
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
       "## Data Loading"
      ]
     },
     {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {},
      "outputs": [],
      "source": [
       "# Load sample sales data\n",
       "data = pd.DataFrame({\n",
       "    'month': ['Jan', 'Feb', 'Mar', 'Apr', 'May'],\n",
       "    'sales': [200, 220, 250, 270, 300],\n",
       "    'region': ['North', 'North', 'East', 'East', 'West']\n",
       "})\n",
       "data.head()"
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
       "## Visualization"
      ]
     },
     {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {},
      "outputs": [],
      "source": [
       "# Reusable function for plotting\n",
       "def plot_sales(df, region=None):\n",
       "    \"\"\"\n",
       "    Plot sales data.\n",
       "\n",
       "    Args:\n",
       "        df (pd.DataFrame): The input DataFrame containing sales data.\n",
       "        region (str, optional): The region to filter data. Defaults to None.\n",
       "\n",
       "    Returns:\n",
       "        None\n",
       "    \"\"\"\n",
       "    if region:\n",
       "        df = df[df['region'] == region]\n",
       "\n",
       "    plt.figure(figsize=(8, 5))\n",
       "    sns.lineplot(data=df, x='month', y='sales', marker='o')\n",
       "    plt.xlabel('Month')\n",
       "    plt.ylabel('Sales')\n",
       "    plt.show()"
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
       "### Plot sales for the North region"
      ]
     },
     {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {},
      "outputs": [],
      "source": [
       "plot_sales(data, region='North')"
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
       "### Plot sales for all regions"
      ]
     },
     {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {},
      "outputs": [],
      "source": [
       "plot_sales(data)"
      ]
     }
    ],
    "metadata": {
     "language_info": {
      "name": "python"
     }
    },
    "nbformat": 4,
    "nbformat_minor": 2
   }