How To Generate Lists From A Specification Of Element Combinations

I want to generate a bunch of lists using combinations of elements specified in a form like the following: [[10, 20], [30, 40], [50, 60]] This means that the values available for

Solution 1:

You can create a double-for-loop list comprehension based on the solution you found:

>>> elements = [[10, 20], [30, 40], [50, 60]]
>>> [x for i in range(len(elements)) for x in itertools.product(*elements[:i+1])]
[(10,),
 (20,),
 (10, 30),
 (10, 40),
 (20, 30),
 (20, 40),
 (10, 30, 50),
 (10, 30, 60),
 (10, 40, 50),
 (10, 40, 60),
 (20, 30, 50),
 (20, 30, 60),
 (20, 40, 50),
 (20, 40, 60)]

Or maybe a bit cleaner, using enumerate:

>>>[x for i, _ inenumerate(elements) for x in itertools.product(*elements[:i+1])]