22 lines
425 B
Markdown
22 lines
425 B
Markdown
---
|
|
title: Flatten list
|
|
tags: list
|
|
expertise: intermediate
|
|
cover: blog_images/jars-on-shelf.jpg
|
|
firstSeen: 2019-09-19T15:46:10+03:00
|
|
lastUpdated: 2020-11-02T19:27:53+02:00
|
|
---
|
|
|
|
Flattens a list of lists once.
|
|
|
|
- Use a list comprehension to extract each value from sub-lists in order.
|
|
|
|
```py
|
|
def flatten(lst):
|
|
return [x for y in lst for x in y]
|
|
```
|
|
|
|
```py
|
|
flatten([[1, 2, 3, 4], [5, 6, 7, 8]]) # [1, 2, 3, 4, 5, 6, 7, 8]
|
|
```
|