python collec code example
Example 1: python ordereddict
>>>
>>> d = {'banana': 3, 'apple': 4, 'pear': 1, 'orange': 2}
>>>
>>> OrderedDict(sorted(d.items(), key=lambda t: t[0]))
OrderedDict([('apple', 4), ('banana', 3), ('orange', 2), ('pear', 1)])
>>>
>>> OrderedDict(sorted(d.items(), key=lambda t: t[1]))
OrderedDict([('pear', 1), ('orange', 2), ('banana', 3), ('apple', 4)])
>>>
>>> OrderedDict(sorted(d.items(), key=lambda t: len(t[0])))
OrderedDict([('pear', 1), ('apple', 4), ('orange', 2), ('banana', 3)])
Example 2: python counter
sum(c.values())
c.clear()
list(c)
set(c)
dict(c)
c.items()
Counter(dict(list_of_pairs))
c.most_common()[:-n-1:-1]
c += Counter()