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updated python_basics
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‎python_basics.ipynb

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"To get the most out of this course, follow along with Andrei and code along with the videos. The course will go over how to install Python on your computer later. To start, you can use Python in [Repl.it](https://replit.com/)."
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]
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},
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{
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"cell_type": "markdown",
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"id": "6a723c1e",
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"metadata": {},
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"source": [
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"- Python Basics\n",
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"- Learning Python\n",
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"- Python Data Types\n",
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"- How to Succeed\n",
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"- Numbers\n",
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"- Math Functions\n",
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"- DEVELOPER FUNDAMENTALS I\n",
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"- Operator Precedence\n",
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"- Optional: Bin and Complex\n",
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"- Variables\n",
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"- Expressions vs. Statements\n",
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"- Augmented Assignment Operator\n",
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"- Strings\n",
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"- String Concatenation\n",
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"- Type Conversion\n",
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"- Escape Sequence\n",
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"- Formatted Strings\n",
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"- String Indexes\n",
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"- Immutability\n",
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"- Built-in Functions and Methods\n",
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"- Booleans\n",
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"- DEVELOPER FUNDAMENTALS II\n",
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"- Lists\n",
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"- List Slicing\n",
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"- Matrix\n",
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"- List Methods\n",
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"- Common List Patterns\n",
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"- List Unpacking\n",
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"- None\n",
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"- Dictionaries\n",
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"- DEVELOPER FUNDAMENTALS III\n",
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"- Dictionary Keys\n",
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"- Dictionary Methods\n",
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"- Dictionary Methods 2\n",
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"- Tuples\n",
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"- Sets\n",
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"- Sets 2"
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]
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},
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{
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"cell_type": "markdown",
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"id": "dbdd5340",
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"cell_type": "code",
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"execution_count": 3,
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"id": "95b42394",
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"metadata": {},
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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},
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"cell_type": "code",
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},
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"cell_type": "code",
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"execution_count": 6,
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},
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"cell_type": "code",
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"execution_count": 7,
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"metadata": {},
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"metadata": {},
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"source": [
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"## Common List Patterns\n",
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"Common list patterns in Python."
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"We'll now learn some useful tricks with lists. One that we've seen is len(), to figure out the length of a string or a list.\n",
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"\n",
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"Another is how to reverse a list, which we can do with the reverse() method or with list slicing."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 10,
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"id": "1b8f9af7",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['x', 'e', 'd', 'd', 'c', 'b', 'a']\n",
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"['a', 'b', 'c', 'd', 'd', 'e', 'x']\n"
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]
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}
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],
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"source": [
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"print(basket)\n",
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"basket.sort() # sort the list\n",
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"basket.reverse() # reverse the sorted list\n",
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"print(basket[::-1]) # reverse the last order of the sorted list with list slicing - creates new list"
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]
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},
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{
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"cell_type": "markdown",
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"id": "cd2e95b0",
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"metadata": {},
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"source": [
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"If we want to generate a numbered list quickly, we can use range."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 13,
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"id": "e0765348",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"range(1, 10)\n",
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"[1, 2, 3, 4, 5, 6, 7, 8, 9]\n"
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]
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}
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],
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"source": [
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"print(range(1, 10))\n",
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"print(list(range(1, 10))) # start, stop (not inclusive)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "ec79474f",
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"metadata": {},
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"source": [
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"join() takes an iterable data structure like a list and joins it together."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 17,
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"id": "0d091ba3",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"hi my name is Andrei\n"
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]
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}
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],
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"source": [
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"sentence = \" \"\n",
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"new_sentence = sentence.join([\"hi\", \"my\", \"name\", \"is\", \"Andrei\"])\n",
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"print(new_sentence)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "9ae59879",
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"metadata": {},
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"source": [
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"## List Unpacking\n",
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"In Python, we can use list unpacking to assign elements of a list to multiple variables. Try out the examples below in your Python environment."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 21,
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"id": "08399771",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"1\n",
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"2\n",
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"3\n",
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"[4, 5, 6, 7, 8]\n",
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"9\n"
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]
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}
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],
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"source": [
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"a,b,c, *rest, d = [1, 2, 3, 4, 5, 6, 7, 8, 9]\n",
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"print(a)\n",
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"print(b)\n",
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"print(c)\n",
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"print(rest)\n",
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"print(d)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "6db20452",
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"metadata": {},
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"source": [
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"## None\n",
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"With None, we saw that some methods worked on lists but didn't output anything. None is a special data type that exists in Python. Most programming languages have a data type like this to represent an absence of value. We'll see this being used a lot more as we get deeper into the course.\n",
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"\n",
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"In a video game for example, when a user is first created, it won't have any weapons at the beginning of the game, so we can use None to represent this."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 22,
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"id": "58e5d1e6",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"None\n"
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]
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}
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],
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"source": [
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"weapons = None\n",
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"print(weapons)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "ed0762ac",
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"metadata": {},
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"source": [
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"## Dictionaries"
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]
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},
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{
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"cell_type": "markdown",
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"id": "34b1beac",
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"metadata": {},
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"source": [
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"## DEVELOPER FUNDAMENTALS III"
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]
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},
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{
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"cell_type": "markdown",
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"id": "c93a6ed0",
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"metadata": {},
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"source": [
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"## Dictionary Keys"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "21319ef5",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {

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