Python Basics From Your Phone

Explore how Python objects use methods on strings and lists, including capitalize, lower, find, and sort, with emphasis on arguments, mutability, and variable storage.

Learn how to locate the exact Python methods you need using dir and help, explore strings with title and find, and discover builtins and code introspection for practical tasks.

Learn to extract parts of strings with Python by slicing, such as the first three characters with 0:3 and the three between indices 1 and 4 from Madrid.

Explore slicing strings to extract a single character using positive and negative indexing, as shown with the cloud.png example and extracting the dot, with practical uses in file paths.

Learn how string formatting builds complete strings from literals and variables, using f-strings with curly braces to assemble URLs with base URL, place, and API key.

Explore how Python handles integers and floats, perform arithmetic, and apply the order of math operators, via a real-world app that generates a pdf invoice from Excel data.

Explore the order of operators in Python, highlighting precedence rules for parentheses, multiplication, addition, and exponentiation, with practical examples and quick calculations.

Discover how boolean operators or and their interaction with comparison operators in Python yield true or false, illustrated by 1<2 and 4<3.

Explores Python lists and tuples, highlighting list mutability and immutable tuples. Demonstrates how a graphical user interface and a todo app use dynamic lists and fixed data like coordinates.

learn to create your own custom functions in python using def, inputs, and return; define a mini function, replicate min, and print outputs from a python file.

Learn to define and call Python functions, using a cube function to compute volume, and explore the anatomy of a function—keyword, name, parameter, argument, body, and return.

clarify scope in Python by distinguishing global and local variables, using x and y as globals and area as a local variable inside the rectangle function.

Learn how Python defines a rectangle class and instantiates it, uses the init method to set self attributes like width and height, then calls an area method to compute area.

Explore exclusive versus independent conditionals by validating emails: check for missing at, example.com domain, and banned lists, using independent if statements and an exit call to halt execution.

Explore how the app reads json data from a url, builds dictionaries with nested dictionaries and lists, and sends news via email to users.

Explore accessing values from simple and nested dictionaries using keys and chain indexing. Practice retrieving country population data, such as India and USA, from multi-level structures.

Explore for loops in a real program that reads Excel files and creates a pdf for each file, using glob to list files.

Learn to iterate over two lists at the same time using a for loop and the zip function to pair corresponding items, producing outputs like John Smith.