### oneliner: Flatten a dict with lists

How nice and simple this is:

That's because sum can use a start value :)

Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on win32

Type "help", "copyright", "credits" or "license" for more information.

>>> d = {'a':[1], 'b':[2,3], 'c':[4,5,6]}

>>> sum(d.values(), [])

[1, 4, 5, 6, 2, 3]

That's because sum can use a start value :)

>>> help(sum)

Help on built-in function sum:

sum(...)

sum(sequence, start=0) -> value

Returns the sum of a sequence of numbers (NOT strings) plus the value

of parameter 'start'. When the sequence is empty, returns start.

<< Home