Quick reference to some common python idioms/capabilities - mainly to serve as a reminder for me

python_hints.py

collections.defaultdict(lambda: 0) # Hash map with default values

 l = [t for t in l if not t in s] # Given a list l and a set s, returns l without all the elements in s

fun_with_many_args(*[1, 2, 3])  # Splat an array into an argument list

fun_with_named_args(**{'arg1': 1, 'arg2': 2}) # Splat a map (dictionary) for named argument functions!