How can I convert List of Lists of Lists into one List? For example I would like to make one list which contains all elements from all nested lists, i.e if I have:
l = [[["A", ["B"]], ["C", "D"]], [["E", "F"], ["A"]]]
then the results should be:
["A", "B", "C", "D", "E", "F", "A"]
This is perhaps not the most efficient, or most pythonic way:
def extract(a):
#recursive algorithm for extracting items from a list of lists and items
if type(a) is list:
l = []
for item in a:
l+=extract(item)
return l
else:
return [a]
Essentially what this does is check if the input is a list. If it is, we split it up into its elements, and run the function on those elements. When we get to a non-list, we return those, forming a complete list.
Another way of doing this would be using a global list to store each element. Again, this isn't the most efficient or pythonic way:
l = []
def extract(a):
#recursive algorithm for extracting items from a list of lists and items
if type(a) is list:
for item in a:
extract(item)
else:
global l
l.append(a)