Groupby in Python

This chapter takes a look at how groupby can be realized in python.

shmakovpn_tools/shmakovpn/tests/group_by/test_group_by.py

Python groupby examnples.

Author: shmakovpn <shmakovpn@yandex.ru>

Date: 2020-09-30

class tests.group_by.test_group_by.TestGroupBy(methodName='runTest')

This class contains tests of different variants of groupby

data2: List[Dict[str, Any]] = [{'name': 'alex', 'score': 2}, {'name': 'john', 'score': 4}, {'name': 'dan', 'score': 1}, {'name': 'alex', 'score': 6}, {'name': 'dan', 'score': 3}]

the dataset for tests

test_group_by_declarative() → None

The simple groupby realization using a declarative approach

test_group_by_declarative2() → None

The simple groupby realization using a declarative approach

test_group_by_declarative3() → None

The simple groupby realization using a declarative approach

test_group_by_functional1() → None

The simple groupby realization using a functional approach

test_group_by_functional2() → None

The simple groupby realization using a functional approach

test_group_by_itertools_sorted() → None

Tests itertools.groupby on sorted dataset.

This test figures out that itertools.groupby really works on the sorted dataset

test_group_by_itertools_unsorted() → None

Tests itertools.groupby on unsorted dataset.

This test figures out that itertools.groupby doesn’t work on the sorted dataset

test_sorted() → None

Tests builtin function sorted