dankrause

class _ExceptionHandlerBase:
    def __init__(self, handler_map):
        self._handler_map = handler_map

    def __call__(self, func):
        def wrapper(*args, **kwargs):
            with self:
                func(*args, **kwargs)

        return wrapper

Miserlou

Largest 1000 Cities in America
2013 popuation data - Biggest US Cities By Population

rank,city,state,population,2000-2013 growth

1,New York,New York,8405837,4.8%
2,Los Angeles,California,3884307,4.8%
3,Chicago,Illinois,2718782,-6.1%
4,Houston,Texas,2195914,11.0%
5,Philadelphia,Pennsylvania,1553165,2.6%

hrldcpr

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!