Important Methods in Python You Should Know

Working with Python collections becomes much easier when you understand their built-in methods.

Here’s a quick cheat sheet covering three essential data structures:

1. Set
add() — Add an element
discard() — Remove an element without raising an error if it is missing
union() — Combine sets
intersection() — Find common elements
issubset() — Check whether a set is a subset

2. Dictionary
get() — Retrieve a value safely
keys() — Access dictionary keys
values() — Access dictionary values
items() — Get key-value pairs
update() — Add or update entries

3. List
append() — Add an element at the end
extend() — Add multiple elements
insert() — Add an element at a specific position
sort() — Sort elements
reverse() — Reverse the list

Python Tip: Choose the right data structure for your task. Lists are great for ordered collections, sets for unique elements, and dictionaries for key-value mappings.

Save this cheat sheet for your next Python project!