Python 3 Engager Course (Free)

1) Interacting with the user
11 Topics | 5 Quizzes
Welcome Message
Quick Environment Setup
1) a. Printing
1. a) Printing (Quiz)
1) a. Printing Examples
1. a) Printing (Practice Problems)
1) b. Multi-line comments
1. b) Multi-line comments Quiz
1) b. Multi-line comments Examples
1) c. Formatting output
1) c. Formatting output Examples
1) d. Getting user input
1. d) Getting User Input Quiz
1) d. Getting user input Examples
1. d) Getting User Input (Practice Problems)
Congrats on finishing Chapter#1!
2) Common Data Types
11 Topics | 4 Quizzes
2) a. Numbers
2) a. Numbers Examples
2) a. Numbers (Practice Problems)
2) b. Boolean
2) b. Boolean Examples
2) b. Boolean (Quiz)
2) c. Strings
2) c. Strings Examples
2) c. Strings (Practice Problems)
2) d. None
2) d. None Examples
2) e. Variable Type Conversion
2) e. Variable Type Conversion Examples
2) e. Variable Type Conversion (Practice Problems)
2) Congratulations on completing Chapter#2
3) Data Structures and Control Flow
26 Topics | 18 Quizzes
3) a. Conditional Statements
3) a. Conditional Statements (Quiz)
3) a. Conditional Statements Examples
3) a. Conditional Statements Examples (2)
3) a. Conditional Statements (Practice Problems)
3) b. For Loop
3) b. For Loop (Quiz)
3) b. For Loop Examples
3) b. For Loop Examples (2)
3) b. For Loop (Problem)
3) c. Lists
3) c. List (Quiz)
3) c. Lists Examples
3) c. Lists Examples (2)
3) c. List (Problem)
3) d. Dictionary
3) d. Dictionary (Quiz)
3) d. Dictionary Examples
3) d. Dictionary Examples (2)
3) d. Dictionary (Problem)
3) e. Tuples
3) e. Tuples (Quiz)
3) e. Tuples Examples
3) e. Tuples Examples (2)
3) e. Tuples (Problem)
3) f. Sets
3) f. Sets (Quiz)
3) f. Sets Examples
3) f. Sets Examples (2)
3. f. Sets (Problem)
3) g. Iterators and Iterables
3) g. Iterators and iterables (Quiz)
3) g. Iterators and Iterables Examples
3) g. Iterators and Iterables Examples (2)
3) g. Iterators and iterables (Problem)
3) h. Common Usage Methods across all Data Structures
3) h. Common Usage (Quiz)
3) i. Common Usage Methods across all Data Structures Examples
3) i. Common Usage (Problem)
3) j. Conversion between data-structures
3. j) Conversion between data structure (Quiz)
3) j. Conversion between data-structures Examples
3) j. Conversion between data-structures Examples (2)
3) j. Conversion between data-structures (Problem)
4) Control Flow Statements (Advanced)
9 Topics | 8 Quizzes
4) a. While Loop
4) a. While Loop (Quiz)
4) a. While Loop Examples
4) a. While Loop Examples (2)
4) a. While Loop (Problem)
4) b. Break and Continue Statements
4) b. Continue and Break Statement (Quiz)
4) b. Break and Continue Statements Examples
4) b. Continue and Break Statement (Problem)
4) c. Pass Statements
4) c. Pass Statement (Quiz)
4) c. Pass Statements Examples
4) c. Pass Statement (Problem)
4) d. Range Function
4) d. Range Function (Quiz)
4) d. Range Function Examples
4) d. Range Function (Problem)
5) Functions
16 Topics | 16 Quizzes
5) Functions Basics
5) Functions Basics (Quiz)
Function Basics (Passing by Reference)
5) Functions Basics (Problems)
5) a. Default Argument Values
5. a) Default Argument (Quiz)
5) a. Default Argument Values Examples
5. a) Default Argument (Problem)
5) b. Keyword Arguments
5. b) Keyword Argument (Quiz)
5) b. Keyword Arguments Examples
5. b) Keyword Argument (Problem)
5) c. Packing Arbitrary Arguments
5. c) Packing Arbitrary Arguments (Quiz)
5) c. Packing Arbitrary Arguments Lists Examples
5. c) Packing Arbitrary Arguments (Problem)
5) d. Unpacking Argument
5. d) Unpacking of arguments (Problem)
5. d) Unpacking of arguments (Quiz)
5) e. Local and Global Variables
5. e) Local and global variable (Problem)
5. e) Local and global variable (Quiz)
5) f. Lambda Expressions
5. f) Lambda Expression (Quiz)
5) g. Function Annotations
5) h. Generators and Generator Expressions
5. h) Generator and generator expression (Quiz)
5) h. Generators and Generator Expressions Examples
5) f. Lambda Expressions Examples
5. f) Lambda Expression (Problem)
5) h. Generators and Generator Expressions Examples (2)
5. h) Generator and generator expression (Problem)
6) Code Style
7 Topics | 4 Quizzes
6) a. Introduction to PEP8
6. a) Introduction to PEP8 (Quiz)
6) a. Introduction to PEP8 Examples
6) b. Indentation
6. b) Indentation (Quiz)
6) b. Indentation Examples
6) c. Maximum Line Length
6. c) Maximum Line Length (Quiz)
6) c. Maximum Line Length Examples
6) d. Imports
6. d) Imports (Quiz)
7) File Handling
8 Topics | 8 Quizzes
7) a. Reading and Writing Files
7. a) Reading and writing file (Quiz)
7) a. Reading and Writing Files Examples
7. a) Reading and writing file (Problem)
7) b. File Handling
7. b) File Handling (Quiz)
7) b. File Handling Examples
7. b) File Handling (Problem)
7) c. Wildcards and glob
7. c) Wildcards and glob (Quiz)
7) c. Wildcards and glob Examples
7. c) Wildcards and glob (Problem)
7) d. JSON
7. d) JSON (Quiz)
7) d. JSON Examples
7. d) JSON (Problem)
8) Error Handling
6 Topics | 3 Quizzes
8) a. Traceback
8) a. Traceback Examples
8) b. try, except statements
8) b. try, except statements (Quiz1)
8) b. try, except statements (Quiz2)
8) b. try, except statements Examples
8) b. try, except statements (Problem)
8) c. Raising Exceptions
8) c. Raising Exceptions Examples
9) Python Modules
9 Topics | 9 Quizzes
9) a. Modules
9. a) Python modules (Quiz)
9) a. Modules Examples
9. a) Python modules (Problem)
9) b. Main Function
9. b) Main Function (Quiz)
9) b. Main Function Examples
9. b) Main Function (Problem)
9) c. Command Line Arguments
9. c) Command line Argument (Quiz)
9) c. Command Line Arguments Examples
9. c) Command line Argument (Problem)
9) d. dir Function
9. d) Dir Function (Quiz)
9) d. dir Function Examples
9. d) Dir Function (Problem)
9) e. Modules vs Packages
9. e) Module vs Package (Quiz)
10) Classes
8 Topics | 8 Quizzes
10) a. Classes and Objects
10) b. Creating a Simple Class
10) b. Creating a Simple Class Examples
10) c. Creating an Instance of a Class
10) c. Creating an Instance of a Class (Quiz)
10. c) Creating instance of a class (Problem)
10) c. Creating an Instance of a Class Examples
10) c. Creating an Instance of a Class (Quiz2)
10) c. Creating an Instance of a Class (Problem2)
10) d. Inheritance
10. d) Inheritance (Quiz)
10. d) Inheritance (Problem)
10) e. Multiple Inheritance
10. e) Multiple inheritance (Quiz)
10) e. Multiple Inheritance Examples
10. e) Multiple inheritance (Problem)
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1) b. Multi-line comments

Python 3 Engager Course (Free) 1) Interacting with the user 1) b. Multi-line comments
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Comments are very important in any programming language. Primarily they can be used to describe parts your code which can be very useful when someone else looks through your code. It can also be a good reminder for yourself especially when come back to your code after a break.

It is a good skill to determine how long and precise your comments are. You shouldn’t comment every single line of your code. The code itself should be written clearly and easy to read. It is recommended to comment blocks of code or add information that can’t be easily expressed by code.

Here are a few examples of different styles of comments.

The single-line comment:

Notice how running the code given above doesn’t show any output. This is because the print statement has been commented out.

Comments add readability to your code.

Let’s say that you’re working on a big product in a corporate. You write code for a small module assigned to you and afterward get busy working on other areas. After a couple of months, you need to revisit your code to make changes. This is where comments are going to help you out. You might have forgotten how your module integrates with other modules or why your code is doing what it’s doing. But if you’d added lots of comments everywhere then it’ll make it a lot easier for you to understand the code.

Writing comments will also help other developers to understand your code.

Block-comments:



There’s another way people write comments. Using triple-quotes.

1
2
3
4
Output:
This is also a string
Will "Long-Legged" Mackie tip-toed quietly through the woods.
The dry leaves made a crispy sound as he tip-toed over them gripping his cutlas, ready for action.



Technically, what we created in the previous example weren’t really comments. They were strings. Multi-line strings!

If you simply create a string but don’t perform any action on it then Python will not fail your program for it. Instead, Python will just ignore that string and move on with the program execution. Hence, these multi-line strings are also used as comments.

That said, the recommended way to create comments is by using the # symbols.

It is a good practice to sprinkle comments throughout your code. It makes your code more readable, not only for others but also for yourself.

You will come across lots of comments throughout the course and you’ll learn to appreciate them as you go along.



A note to visitors:

Suppose you finish a couple of chapters + exercises (whichever course you learn from). Can we say you’re done with those chapters?

The answer is a no. Why can’t you say you’re done with “completed” chapters? Because your brain will start forgetting concepts and it needs to revise the earlier concepts. That is tedious.

Hence, this course teaches you concepts with “spaced repetitions”. This means that as you progress, you will keep encountering earlier concepts, keep revising them, learn to use them with new concepts – which will improve your retention and solidify your concepts.

You have to do less of a “chapter-waltz” this way, so you don’t have to constantly go back to earlier chapters to revise them. Your learning is easier and simpler. Revision is automatic when you learn with spaced repetitions.

That said you will, occasionally, still need to revisit earlier chapters (but that’s still a hell of a lot easier when you learn with spaced repetitions). Do you like this idea? Try out our full course!

Get access to the full course!

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