23 lines
488 B
Markdown
23 lines
488 B
Markdown
---
|
|
title: spread
|
|
tags: list,intermediate
|
|
firstSeen: 2018-01-08T22:38:05+02:00
|
|
lastUpdated: 2020-09-15T16:13:06+03:00
|
|
---
|
|
|
|
Flattens a list, by spreading its elements into a new list.
|
|
|
|
- Loop over elements, use `list.extend()` if the element is a list, `list.append()` otherwise.
|
|
|
|
```py
|
|
def spread(arg):
|
|
ret = []
|
|
for i in arg:
|
|
ret.extend(i) if isinstance(i, list) else ret.append(i)
|
|
return ret
|
|
```
|
|
|
|
```py
|
|
spread([1, 2, 3, [4, 5, 6], [7], 8, 9]) # [1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
```
|