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Today Xiaobian to share with you how python filters the list of unique values related knowledge points, detailed content, clear logic, I believe most people still know too much about this knowledge, so share this article for your reference, I hope you have some gains after reading this article, let's learn about it together.

1. Use the collections.Counter function to count the list, and filter out non-unique values through list derivation, filtering out values with a count greater than 1.

Counter is a subclass of dict and is used to count hashable objects. Is a collection, where elements are stored like dictionary keys and counts are stored as values.

Count can be any integer value, including 0 and negative. It can receive an iterable object and count its elements.

examples

from collections import Counter def filter_unique(lst): return [item for item, count in Counter(lst).items() if count > 1] # EXAMPLESfilter_unique([1, 2, 2, 3, 4, 5]) # [2, 4]Python is mainly used for what Python is mainly used for:

1. Web development;

2. Data science research;

3. Web crawler;

4. Embedded application development;

5. Game development;

Desktop application development.

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