Python One-Liners

Common Python shortcuts and tricks

PythonShortcutsTips

List Operations

Filter

[x for x in list if x > 0]

List comprehension filter

Map

[x * 2 for x in list]

Transform each element

Flatten

[x for sub in list for x in sub]

Flatten nested list

Unique

list(set(my_list))

Remove duplicates

String Operations

Reverse

"hello"[::-1]

Reverse a string

Join

", ".join(list)

Join list to string

Split

"hello world".split()

Split string to list

File & Data

Read file

open('file.txt').read()

Read entire file

JSON

import json; json.loads(string)

Parse JSON string

Swap

a, b = b, a

Swap two variables