Correct typos, improve grammar, and refine wording for clarity

PythonIntro.ipynb

@@ -1,54 +1,54 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# An Introduction To Scripting in Python 3\n",
-    "By __[Hans van der Kwast](http://www.linkedin.com/in/jvdkwast)__<br>\n",
-    "__[IHE Delft Institute for Water Education](http://www.un-ihe.org)__<br>\n",
-    "Twitter: @hansakwast\n",
-    "\n",
-    "\n",
-    "## Contents\n",
-    "### __[Lesson 1: Very Simple Programs](PythonIntroCh1.ipynb)__\n",
-    "### __[Lesson 2: Programs in a file, variables and strings](PythonIntroCh2.ipynb)__\n",
-    "### __[Lesson 3: Loops, Loops, Loops, Loops...](PythonIntroCh3.ipynb)__\n",
-    "### __[Lesson 4: Functions](PythonIntroCh4.ipynb)__\n",
-    "### __[Lesson 5: Tuples, Lists, and Dictionaries](PythonIntroCh5.ipynb)__\n",
-    "### __[Lesson 6: For Loop](PythonIntroCh6.ipynb)__\n",
-    "### __[Lesson 7: Classes](PythonIntroCh7.ipynb)__\n",
-    "### __[Lesson 8: Modules](PythonIntroCh8.ipynb)__\n",
-    "### __[Lesson 9: File I/O](PythonIntroCh9.ipynb)__\n",
-    "### __[Lesson 10: Exception Handling](PythonIntroCh10.ipynb)__\n",
-    "<br>\n",
-    "<br>\n",
-    "\n",
-    "*This Jupyter Notebook has been developed based on \"A Beginner's Python Tutorial\" by Steven Thurlow. The __[original material](https://github.com/stoive/pythontutorial)__ has been ported to Python 3.*\n",
-    "\n",
-    "*This work is licensed under the Creative Commons Attribution 2.5 Australia License. To view a copy of this license, visit http://creativecommons.org/licenses/by/2.5/au/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.*"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.6.5"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 2
-}
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# An Introduction To Scripting in Python 3\n",
+    "By __[Hans van der Kwast](http://www.linkedin.com/in/jvdkwast)__<br>\n",
+    "__[IHE Delft Institute for Water Education](http://www.un-ihe.org)__<br>\n",
+    "X (Formerly Twitter): @hansakwast\n",
+    "\n",
+    "\n",
+    "## Contents\n",
+    "### __[Lesson 1: Very Simple Programs](PythonIntroCh1.ipynb)__\n",
+    "### __[Lesson 2: Programs in a file, variables and strings](PythonIntroCh2.ipynb)__\n",
+    "### __[Lesson 3: Loops, Loops, Loops, Loops...](PythonIntroCh3.ipynb)__\n",
+    "### __[Lesson 4: Functions](PythonIntroCh4.ipynb)__\n",
+    "### __[Lesson 5: Tuples, Lists, and Dictionaries](PythonIntroCh5.ipynb)__\n",
+    "### __[Lesson 6: For Loop](PythonIntroCh6.ipynb)__\n",
+    "### __[Lesson 7: Classes](PythonIntroCh7.ipynb)__\n",
+    "### __[Lesson 8: Modules](PythonIntroCh8.ipynb)__\n",
+    "### __[Lesson 9: File I/O](PythonIntroCh9.ipynb)__\n",
+    "### __[Lesson 10: Exception Handling](PythonIntroCh10.ipynb)__\n",
+    "<br>\n",
+    "<br>\n",
+    "\n",
+    "*This Jupyter Notebook has been developed based on \"A Beginner's Python Tutorial\" by Steven Thurlow. The __[original material](https://github.com/stoive/pythontutorial)__ has been ported to Python 3.*\n",
+    "\n",
+    "*This work is licensed under the Creative Commons Attribution 2.5 Australia License. To view a copy of this license, visit http://creativecommons.org/licenses/by/2.5/au/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.*"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

PythonIntroCh1.ipynb

@@ -13,13 +13,12 @@
    "source": [
     "# 1. Very simple 'programs'\n",
     "## 1.1 Running Python from the command line\n",
-    "In order to test pieces of code we can run Python from the command line. In this Jupyter Notebook we are going to simulate this. You can type the commands in the fields and execute them.<br>\n",
+    "In order to test pieces of code, we can run Python from the command line. In this Jupyter Notebook, we are going to simulate this. You can type the commands in the fields and execute them.<br>\n",
     "In the field type:<br>\n",
     "```python\n",
     "print('Hello, World')\n",
     "```\n",
-    "Then press `<shift> + <return>` to execute the command.\n",
-    "\n"
+    "Then press <kbd>Shift</kbd> + <kbd>Return</kbd> to execute the command."
    ]
   },
   {
@@ -35,7 +34,7 @@
    "source": [
     "What happened?\n",
     "\n",
-    "You just created a program, that prints the words 'Hello, World'. The Python environment that you are in immediately compiles whatever you have typed in. This is useful for testing things, e.g. define a few variables, and then test to see if a certain line will work. That will come in a later lesson, though."
+    "You just created a program that prints the words 'Hello, World'. The Python environment that you are in immediately compiles whatever you have typed in. This is useful for testing things, e.g. define a few variables, and then test to see if a certain line will work. That will come in a later lesson, though."
    ]
   },
   {
@@ -178,7 +177,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "This demonstrates that you can print text and calculations in a sentence. The commas separating each section are a way of separating strings (text) from calculations or variable."
+    "This demonstrates that you can print text and calculations in a sentence. The commas separating each section are a way of separating strings (text) from calculations or variables."
    ]
   },
   {
@@ -233,7 +232,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Remember that thing called order of operation that they taught in maths? Well, it applies in Python, too. Here it is, if you need reminding:<br>\n",
+    "Remember that thing called the order of operations that they taught in maths? Well, it applies in Python, too. Here it is, if you need reminding:<br>\n",
     "1. Parenthesis `()`\n",
     "2. Exponents `**`\n",
     "3. Multiplication `*`, division `/` and remainder `%`\n",