Python tip to group arrays
Grouping is one of the most important in data cleansing. In the Python, itertools package is one of the most important. For example, Following source shows how to group the array by name and age using Python build-in libraries. import itertools from operator import itemgetter import json import StringIO import gzip import logging from module import mytest source = [ {'name':'z', 'age':21, 'other':'z-21'}, {'name':'z', 'age':21, 'other':'z-21-duplicated-1'}, {'name':'z', 'age':21, 'other':'z-21-duplicated-2'}, {'name':'z', 'age':20, 'other':'z-20'}, {'name':'c', 'age':31, 'other':'c-31'}, {'name':'c', 'age':30, 'other':'c-30'}, ] grouper = itemgetter('name','age') s = sorted(source, key=grouper) import