Sort a list of dicts by a key value in the dict

sort_by_dict_key.py

# given a list such as:
# list = [{'title':title, 'date': x.created_on}, ...]
# you can sort on a dict key like such
list.sort(key=lambda item:item['date'], reverse=True)
#source: http://stackoverflow.com/questions/652291/sorting-a-list-of-dictionary-values-by-date-in-python