CS50x 2024 - Lecture 6 - Python

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This is CS50, Harvard University's introduction to the intellectual enterprises of computer science and the art of programming.

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TABLE OF CONTENTS

00:00:00 - Introduction
00:01:01 - Python
00:07:24 - Speller
00:13:41 - Filter
00:17:31 - Face Recognition
00:20:53 - Functions
00:33:24 - Types
00:34:47 - Calculator
00:44:45 - Conditionals
00:48:05 - Compare
00:57:18 - Object-Oriented Programming
01:02:54 - Loops
01:13:51 - Meow
01:21:20 - Truncation
01:25:54 - Exceptions
01:33:22 - Mario
01:39:44 - Lists
01:49:18 - Dictionaries
01:59:58 - sys
02:04:04 - pip

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LICENSE

CC BY-NC-SA 4.0
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Public License

David J. Malan

[jrb]

What an amazing professor. Not a single boring moment .

[neclis]

Incredible teacher, as much a stand up performer as an expert in his field. What energy he puts in his work ...

[justanothernothuman]

"Malloc is gone, pointers are gone, free is gone!" thanks to the lord !

[gauravrawat.]

00:02 Transition from C to Python
03:11 In Python, programs no longer need to be compiled before running, unlike C programs.
07:11 Python allows escaping of apostrophes and offers quicker implementation for real work.
09:19 Defining functions and manipulating sets of words in Python
13:41 How to blur an image using Python and PIL library
15:54 Python makes solving problems more efficient and readily.
20:16 Python's popularity and CS50's goal to teach programming
22:05 In Python, you import the name of the library instead of including a .h file, allowing for more precise control over the specific functions you want to use.
25:49 Python provides three ways to concatenate strings.
27:57 Different ways of concatenating strings in Python
31:50 Python makes variable declaration and manipulation simpler.
33:54 Python simplifies variable types for ease of use.
37:43 Input from keyboard is treated as strings in Python
39:52 Converting x and y to integers in Python using int() function.
43:43 Importing libraries and avoiding function collisions in Python.
45:45 Python uses indentation instead of curly braces for code blocks
49:32 Python strings behave differently than in C
51:33 Python is meant to be higher-level and more accessible.
55:43 Designing a solution for handling Y and Yes without capitalization.
57:40 Strings in Python come with built-in functions for operations like uppercase, lowercase, etc.
1:01:46 Introduction to using loops in Python
1:03:42 Python uses a more concise syntax for looping compared to C.
1:07:23 Python makes looping easier than C using iterable objects.
1:09:23 Python's print() function can customize line endings.
1:13:42 Introducing loops and creating functions in Python
1:15:29 Defining and calling a custom function in Python
1:19:24 Enhancing function implementation with parameters in Python
1:21:13 Python handles truncation differently than C
1:25:00 Python has advantages over C in handling floating point precision and integer overflow.
1:26:57 Introduction to using functions in Python
1:30:51 The get_int() function in Python involves input, conversion to integer, and exception handling for ValueError.
1:32:41 Handling exceptions in Python and using loops to create Mario-like structures
1:36:32 Using loops and Pythonic implementation
1:38:36 Python lists automatically handle memory and are like linked lists
1:42:30 Python allows for easy manipulation of lists using built-in functions and methods.
1:44:38 Adding lists in Python and linear search
1:48:20 Python allows for efficient searching and data storage using dictionaries.
1:50:25 Creating a list of dictionaries in Python
1:54:35 Python uses square brackets with strings to access dictionary instead of dot notation used in C.
1:56:26 You can simplify dictionaries and use single quotes to avoid mixing double quotes in Python.
2:00:44 Using command-line arguments and sys library in Python
2:02:44 Using sys module in Python for command-line arguments and program exits.
2:07:01 Creating QR code in Python.

[mtarik]

57:18 What a beautiful way to explain what OOP is in basic terms!

[bassycounter]

“I apologize if you’re harboring resentment that this wasn’t a week earlier” 😂It’s okay professor, I have accepted that to understand programming and computer science better, I must dive into lower level stuff occasionally, week 5 was tough but I persevered!

[FarizDarari]

It's mindblowing how a course video with such content quality is free. Thanks, huge thanks, CS50!

[ducktavian]

They just rickrolled an entire lecture room 😂

[AskforQAli]

Happy New year to you all!! May 2024 be the best year for your personal growth

[angelofinassu]

Finally python friends, I discovered CS wold through python years ago, but now with a university, it's very rewarding to go back to studying once again

[emiliosaliba]

Best IT proffessor i ever had, amazing explanations, dinamic, thanx a lot from a poor southamerican

[harshgawali]

The ending was damn! 😂
well done CS50

[brooksgunn]

Ah, the endings are always funny and uplifting!

[tahashaikh]

Once again, What a lecture! Forever grateful to the cs50 team for putting this course up for free. We love it.

[hhhhh]

Wish i had just one teacher like David Malan or Brian Yu in my entire education journey . :-)

[hdmiranda]

If only I had a professor of this caliber when I was in college, I would have been further along in my career. Thank you for enlightening the world by sharing these lectures.

[aopen]

can't wait for Javascript lecture so it will break everything we learned here.

[zikeng]

There's no goddamn way we got rickrolled by harvard university

[RobertMooney-utcc]

"And that was CS50!" Prof. David Malan gives an excellent lecture yet again.

[ryokudoom]

Can't believe i got rickrolled when rolling into my coding class