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Merge pull request #176 from mx-psi/filterimprov

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[FIX: #170] Improve filter functions
This commit is contained in:
Angelos Chalaris
2020-01-05 14:39:41 +02:00
committed by GitHub
parent 680002c8bd ded0927bad
commit f28ac824d4
2 changed files with 10 additions and 4 deletions
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7
snippets/filter_non_unique.md
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@ -5,11 +5,14 @@ tags: list,beginner
Filters out the non-unique values in a list.
Use list comprehension and `list.count()` to create a list containing only the unique values.
Use a `Counter` to get the count of each value in the list.
Use list comprehension to create a list containing only the unique values.
```py
from collections import Counter
def filter_non_unique(lst):
return [item for item in lst if lst.count(item) == 1]
return [item for item, count in counter = Counter(lst).items() if count == 1]
```
```py

7
snippets/filter_unique.md
View File

@ -5,11 +5,14 @@ tags: list,beginner
Filters out the unique values in a list.
Use list comprehension and `list.count()` to create a list containing only the non-unique values.
Use a `Counter` to get the count of each value in the list.
Use list comprehension to create a list containing only the non-unique values.
```py
from collections import Counter
def filter_unique(lst):
return [x for x in set(item for item in lst if lst.count(item) > 1)]
return [item for item, count in Counter(lst).items() if count > 1]
```
```py