How to find elements that are common to all lists in a nested list?

Question

I have a large nested list and each list within the nested list contains a list of numbers that are formatted as floats. However every individual list in the nested list is

Answer 1

Try this, it's the simplest solution:

set.intersection(*map(set, nested_list))

Or if you prefer to use generator expressions, which should be a more efficient solution in terms of memory usage:

set.intersection(*(set(e) for e in nested_list))