000_Welcome_on_Board.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<a href=\"https://www.hydroffice.org/epom/\"><img src=\"images/000_000_epom_logo.png\" alt=\"ePOM\" title=\"Open ePOM home page\" align=\"center\" width=\"12%\" alt=\"Python logo\\\"></a>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<a href=\"https://piazza.com/class/js5dnu0q39n6qe\"><img src=\"images/help.png\" alt=\"ePOM\" title=\"Ask questions on Piazza.com\" align=\"right\" width=\"10%\" alt=\"Piazza.com\\\"></a>\n",
    "# Welcome on Board!"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "If you are reading this notebook, you are likely to be a student at the [Center for Coastal and Ocean Mapping / NOAA-UNH Joint Hydrographic Center (CCOM/JHC)](https://ccom.unh.edu). Welcome!\n",
    "\n",
    "As a student, you will have assignments for the courses that you will be taking. These assignments can come in the form of practical laboratory exercises, presentations, essays, and many other forms. A large number of exercises have a significant 'coding' component, meaning that you are expected to write some short computer programs (code) to achieve certain ocean-mapping related tasks. \n",
    "\n",
    "We do not assume that you are familiar with computer programming, and we have therefore created this short training on programming basics. Through a set of notebooks, we will provide you with the basic coding knowledge required for the successful completion of your first assignments. The notebooks use Python, the preferred programming language at [CCOM/JHC](https://ccom.unh.edu). This document is an example of a Python notebook and is the first of the series in **Programming Basics with Python for Ocean Mapping.**"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The overall task is to lead you through some basic concepts of programming using the Python language, with a focus on their application to the Ocean Mapping field."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The main teaching goals are:\n",
    "\n",
    "* Provide you with enough basic Python skills to successfully complete lab assignments. Thus, *this is not a full course on how to program in Python!*\n",
    "* Familiarize you with several programming concepts.\n",
    "* Introduce you on how to use the extensive help and resources available for Python.\n",
    "* Provide you with programming habits and skills that are directly applicable to other programming environments despite differences in syntax."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**On your arrival at CCOM/JHC,  we will evaluate your understanding of the basic notions presented in these notebooks during the orientation week**. This will happen through a review notebook with exercises similar to the ones in this collection. Thus, if you experience difficulties in completing this training, it is important to seek help from all sources before your arrival at CCOM/JHC, including fellow students and us. We are always willing to help!"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "---"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We will use the following two symbols to guide you through the notebooks:"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "A blue triangle with a key highlights the **key concepts**. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/info.png\">\n",
    "\n",
    "An `i` within a yellow circle indicates **supplemental information**. Thus, you may decide to skip these parts at a first read. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Why Use Python?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img src=\"https://upload.wikimedia.org/wikipedia/commons/thumb/c/c3/Python-logo-notext.svg/110px-Python-logo-notext.svg.png\"\n",
    "     align=\"left\"\n",
    "     width=\"10%\"\n",
    "     alt=\"Python logo\\\">"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "[Python](http://www.python.org/) is a [very popular](https://www.economist.com/graphic-detail/2018/07/26/python-is-becoming-the-worlds-most-popular-coding-language) programming language with applications [across different fields](https://www.python.org/about/apps/)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Its popularity may be explained by a number of facts, such as that the language is:\n",
    "\n",
    "* **Clean and simple**: The code is easy to read, and it is simple to learn the basic syntax.\n",
    "* **Expressive**: A task is usually achieved with fewer lines of code than for other programming languages. Fewer lines of code often translate to fewer bugs and code easier to maintain.\n",
    "* **Free** and **Open Source Software** ([FOSS](https://en.wikipedia.org/wiki/Free_and_open-source_software)): No need to pay for using it, and the content of the source code is not hidden from the users. Thus, it is available to you before and after your stay at [CCOM/JHC](https://ccom.unh.edu).\n",
    "* **Well designed**: It encourages many good programming practices."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Additional benefits are that:\n",
    "\n",
    "* **A large [standard library](https://en.wikipedia.org/wiki/Standard_library) is available**: Python has long maintained the philosophy of *batteries included*. Many functionalities are immediately available, without making the user download separate packages.\n",
    "* **A large community maintains thousands of third-party packages**: Many of these packages are made available through the [Python Package Index (PyPI) repository](https://pypi.org/)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "However, you need to be aware that Python does have some weaknesses. Among them:\n",
    "\n",
    "* Python code can be **slower** when compared to other programming languages. However, there are a few effective ways to speed up its execution time and obtain performance similar to other programming languages.\n",
    "* The large number of third-party packages, tutorials, blog posts and other kinds of material publicly available are overwhelming. It can be **quite difficult to orient yourself and assess the available information**. This is particularly true when you start to learn."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/info.png\">\n",
    "\n",
    "Python has being constantly improved in the part years. These notebooks **only** use the latest version of the language: **Python 3**. The past version of the language, [**Python 2**](https://pythonclock.org/), will *retire* soon and no longer be maintained! Thus, when searching online for  help, make sure the results refer to **Python 3**."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Along with basic concepts of programming, this collection of notebooks will help you to familiarize with a minimal, but useful subset of Python functionality. However, before starting this programming journey, you will learn some basic notions on how to use a notebook like the present one. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# What is a Notebook?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "A notebook is not just a simple text document, but an **interactive computing environment** with code and multimedia content in a single file."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This translates to the facts that you can:\n",
    "\n",
    "* **Edit and run code** in a browser.\n",
    "* **Visualize** the results attached to the code used to generate them.\n",
    "* **Write narrative text**.\n",
    "\n",
    "The main components of the interface are (See the below image):\n",
    "\n",
    "* A series of **cells**.\n",
    "* The **title bar** with the **notebook name**.\n",
    "* The **Menu bar**.\n",
    "* The **Toolbar**.\n",
    "\n",
    "![Click on the Run button](images/000_005_interface.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Thus each notebook consists of a series of cells. The number of cells in each notebook is variable since the user can easily add and remove them."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "The **active cell** has a blue or green bar to the far left. (See the above image.)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "There are two main types of cells: **Markdown** and **Code**."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## What is a Markdown cell?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "A **Markdown** cell is a notebook section where you can add some descriptive text such as notes describing a lab experiment. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The area where you are reading this sentence is itself a **Markdown** cell. If you press `Enter` (or double click) on this text, the cell will switch to **edit mode**. *Try it!*\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "If you want to stop the **edit mode** of the above cell, just click on the <button class='btn btn-default btn-xs'><i class=\"icon-step-forward fa fa-step-forward\"></i></button> Run button *at the top of this notebook* (or, alternatively, press `Shift+Enter`) and the cell will switch back to **command mode** (and the marked-up text is rendered):\n",
    "\n",
    "![Click on the Run button](images/000_010_run_button.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This kind of cell is called **Markdown** because you can format (mark up) the entered text to get special effects. \n",
    "\n",
    "For instance, by surrounding a word (e.g., ocean) with:\n",
    "\n",
    "- A single \\* character (e.g., \\*ocean\\*), the word will be rendered in *italic* font (e.g., *ocean*). \n",
    "- Two consecutive \\* characters (e.g., \\*\\*ocean\\*\\*), the word will be rendered in **bold** font (e.g., **ocean**)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/info.png\">\n",
    "\n",
    "To render the \\* character in itself (or other special characters), add an \\\\ character in front of it."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/info.png\">\n",
    "\n",
    "For this collection of notebooks, you don't really need to learn more about **Markdown**. However, if you want to know more about it, follow [this link](https://jupyter-notebook.readthedocs.io/en/stable/examples/Notebook/Working%20With%20Markdown%20Cells.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## What is a Code cell?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "A **Code** cell is a notebook section where you can write, modify, and execute code. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The following cell is a **Code** cell. You can recognize a **Code** cell since it has a `In [ ]` to the far left. \n",
    "\n",
    "This **Code** cell does the very basic task of printing a `\"Hello Python\"` text. The next notebooks will introduce the main concepts of programming with Python. At this time, you will learn to execute the code in a **Code** cell:\n",
    "\n",
    "- Activate the following Code cell by clicking in it.\n",
    "- Click the <button class='btn btn-default btn-xs'><i class=\"icon-step-forward fa fa-step-forward\"></i></button> Run button in the Toolbar (or, alternatively, press `Shift+Enter`) like you did for the **Markdown** cell."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "print(\"Hello Python\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "If you got a `Hello Python` text under the **Code** cell, *congratulations!* You have successfully executed the Python code."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "It is strongly recommended that you execute a **Code** cell any time that you find one of them while reading these notebooks. It makes this journey more interactive!  "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "The `print()` performs the *action* to display text between the two parentheses."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "The `print()` is just one of the many *actions* that are defined in Python. In coding, these actions are called **functions**."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " You will soon learn about many of the predefined Python functions, and how to create your own functions. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Give a second look at the code in the above **Code** cell. It does not have space characters before or after the `(` parenthesis or before the `)` parenthesis. What happens if we add spaces? Try to execute the following **Code** cell that has additional space characters."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "print ( \"Hello Python\" )"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Python simply ignores the additional space characters. However, adding those characters does **not** follow the official Python coding style that is named [PEP8](https://www.python.org/dev/peps/pep-0008/). In this collection of notebooks, we follow the [PEP8](https://www.python.org/dev/peps/pep-0008/) coding style that does not allow additional space characters. Thus:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "print(\"Hello Python\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "These notebooks have an handy functionality (named `autopep8`) to reformat the code that does not follow the [PEP8](https://www.python.org/dev/peps/pep-0008/) coding style. \n",
    "\n",
    "To use it, activate (by clicking in it) the previous **Code** cell with additional space characters, then click on the <button class='btn btn-default btn-xs'><i class=\"fa fa-legal\"></i></button> button in the Toolbar (see the below image if not able to localize the button):\n",
    "\n",
    "![Click on the autopep8 button](images/000_015_autopep8.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The content in the **Code** cell will be automatically reformatted from `print ( \"Hello Python\" )` to `print(\"Hello Python\")`."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/key.png\">\n",
    "\n",
    "The <button class='btn btn-default btn-xs'><i class=\"fa fa-legal\"></i></button> button modifies the content of a **Code** cell to adhere to the [PEP8](https://www.python.org/dev/peps/pep-0008/) coding style. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Notebook Exercises"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Each notebook contains text and example code, but also several exercises for you to solve. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/test.png\">\n",
    "\n",
    "A test sheet with a pencil indicates the beginning of an exercise."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "A typical exercise has three parts:\n",
    "\n",
    "1. Some text explaining the exercise.\n",
    "3. A *Show Solution* button that will load a solution for the exercise.\n",
    "2. An empty or partially filled cell where you will write your solution.\n",
    "\n",
    "Here is your first exercise!"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "solution2": "hidden",
    "solution2_first": true
   },
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/test.png\">\n",
    "\n",
    "Write code that prints the following text: `Python is easy to learn!`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "solution2": "hidden"
   },
   "outputs": [],
   "source": [
    "print(\"Python is easy to learn!\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# How to Save a Notebook?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Each time that you modify a notebook (e.g., for writing a solution to an exercise), you must save those modifications using the <button class='btn btn-default btn-xs'><i class=\"fa fa-save\"></i></button> button in the Toolbar (see the below image if not able to localize the button):\n",
    "\n",
    "![Click on the save button](images/000_018_save.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Although an `autosave` functionality is implemented, we **strongly** recommend that you save your work regularly and, in particular, before closing or refreshing your web browser. \n",
    "\n",
    "Once saved, all the modifications will be available for the next time that you need to access a notebook."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# How to Clear the Results of a Notebook?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Each time that you execute a **Code** cell in a notebook, the coding results are shown in its output section (e.g., the `Hello Python` text after the above **Code** cells).\n",
    "If you want to clear all the coding results in a notebook, you may do so by clicking in the Menu bar: `Kernel/Restart and Clear Output`.\n",
    "\n",
    "![How to clear a notebook](images/000_020_dashboard_restart_kernel_and_clear_output.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Summary on How to Use a Notebook"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- A notebook has two modes: **command Mode** and **edit Mode**.\n",
    "- When in **command mode**, double click or press `Enter` to edit a given cell (like this **Markdown cell**).\n",
    "- When in **edit mode**:\n",
    "  - To switch back to **command mode**, press `Esc` to stop the editing.\n",
    "  - To execute the cell, click the <button class='btn btn-default btn-xs'><i class=\"icon-step-forward fa fa-step-forward\"></i></button> Run button in the Toolbar or press `Shift+Enter`.\n",
    "- To modify the code to follow the [PEP8](https://www.python.org/dev/peps/pep-0008/) coding style, click on the <button class='btn btn-default btn-xs'><i class=\"fa fa-legal\"></i></button> button in the Toolbar.\n",
    "- To save a modified notebooks, click the <button class='btn btn-default btn-xs'><i class=\"fa fa-save\"></i></button> button in the Toolbar.\n",
    "- To clear the notebook results, click `Kernel/Restart and Clear Output` in the Menu bar.\n",
    "\n",
    "The above list contains just the minimal set of what a notebook can do, but it is enough for starting to work with this collection of notebooks."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/info.png\">\n",
    "\n",
    "The Menu bar and the Toolbar give you access to several other actions: e.g., add/delete a cell, change the type of an active cell. If you want to learn more about the notebook interface, [this page](https://jupyter-notebook.readthedocs.io/en/stable/notebook.html#notebook-user-interface) is a good starting point."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/info.png\">\n",
    "\n",
    "Python is also used outside of notebooks (stand-alone programs and command-line tools among others). The examples and exercises within these notebooks are just one way to access the power of Python."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# How to Access the Other Notebooks?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "1. Right-click on the first icon at the top left part of this notebook, then select the option to open on a new tab:\n",
    "\n",
    "![How to open the Jupyter dashboard](images/000_110_open_dashboard.png)\n",
    "\n",
    "2. Once that the browser open the notebook dashboard, click on the folder named `python_basics`:\n",
    "\n",
    "![Jupyter dashboard with_root_folder](images/000_120_dashboard_with_root_folder.png)\n",
    "\n",
    "3. The dashboard page will list all the available notebooks (e.g., `000_Welcome_on_board.ipynb` is this current notebook):\n",
    "\n",
    "![Jupyter dashboard listing_notebooks](images/000_130_dashboard_list_of_notebooks.png)\n",
    "\n",
    "4. It is possible to click and access the listed notebooks in any order. However, you should follow their numerical order the first time that you go through them. This is because they incrementally introduce new concepts."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Alternatively, **Navigation** links at the bottom of each notebook provide access to:\n",
    "\n",
    "* The previous notebook (when available).\n",
    "* An index listing all the notebooks.\n",
    "* The next notebook (when available)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Questions or Comments?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "These notebooks have a virtual gathering place on [Piazza.com](https://piazza.com/class/js5dnu0q39n6qe) where you can ask (but also answer!) questions to instructors and fellow students."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<a href=\"https://piazza.com/class/js5dnu0q39n6qe\"><img src=\"images/000_200_piazza_com.png\" title=\"Open Piazza.com\" align=\"center\" width=\"80%\" alt=\"Piazza.com\\\"></a>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/help.png\">\n",
    "\n",
    "A red megaphone at the top-right corner of each notebook provides a link to [Piazza.com](https://piazza.com/class/js5dnu0q39n6qe). "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "You can learn more about Piazza.com by watching [this video](https://www.youtube.com/watch?v=2jLSiN8E18w)."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "If you click on this [Piazza.com](https://piazza.com/class/js5dnu0q39n6qe) link, you can register yourself as a student to access the virtual gathering place.\n",
    "\n",
    "Once registered, what about introducing yourself to the community?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "solution2": "hidden",
    "solution2_first": true
   },
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px;\" src=\"images/test.png\">\n",
    "\n",
    "Add a note containing your self-introduction in the \"community\" folder on [Piazza.com](https://piazza.com/class/js5dnu0q39n6qe). The following image shows how to do it in eight steps. Feel free to customize the text in the note as you prefer!\n",
    "<br><br>\n",
    "![Seven steps for a self-introduction note](images/000_250_eight_steps.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "solution2": "hidden"
   },
   "source": [
    "If you follow the eight steps, the result will be a note similar to the following one (but with your specific details):\n",
    "\n",
    "![Note example](images/000_280_note_example.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"6%\" style=\"padding-right:10px; padding-top:10px;\" src=\"images/refs.png\">\n",
    "\n",
    "## Useful References"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- [The Python website](http://www.python.org/)\n",
    "- [PEP8 -- Style Guide for Python Code](https://www.python.org/dev/peps/pep-0008/)\n",
    "- [Python 2 End of Life Clock](https://pythonclock.org/)\n",
    "- [The official introductory notebooks for Jupyter Notebooks](https://nbviewer.jupyter.org/github/jupyter/notebook/tree/master/docs/source/examples/Notebook/)\n",
    "- [The Jupyter Notebook manual](https://jupyter-notebook.readthedocs.io/en/stable/notebook.html)\n",
    "\n",
    "  - [Browser compatibility](https://jupyter-notebook.readthedocs.io/en/stable/notebook.html#browser-compatibility)\n",
    "  - [The interface page](https://jupyter-notebook.readthedocs.io/en/stable/notebook.html#notebook-user-interface)\n",
    "  - [The Markdown page](https://jupyter-notebook.readthedocs.io/en/stable/examples/Notebook/Working%20With%20Markdown%20Cells.html)\n",
    " \n",
    "- Excellent free e-books to learn more about Python and Data Science:\n",
    "  - [*Think Python 2nd Edition* by Allen B. Downey](http://greenteapress.com/wp/think-python-2e/)\n",
    "  - [*Python Data Science Handbook* by Jake VanderPlas](https://jakevdp.github.io/PythonDataScienceHandbook/)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img align=\"left\" width=\"5%\" style=\"padding-right:10px;\" src=\"images/email.png\">\n",
    "\n",
    "*For issues or suggestions related to this notebook, write to: epom@ccom.unh.edu*"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<!--NAVIGATION-->\n",
    "| [Contents](index.ipynb) | [Variables and Type >](001_Variables_and_Types.ipynb)"
   ]
  }
 ],
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