Question

I got a list of lists and don’t know how to filter out duplicates (to a new list).

I tried extracting a path list and succesfully filtered out the duplicates,

dup_pathlist = pathA, pathA, pathC, pathC

but I couldn’t recover the original connection between node and dupl_pathlist items. 🙁

I start with this:

node_path_list = [['node1', 'pathA'], ['node2', 'pathA'], ['node3', 'pathB'], ['node4', 'pathC'], ['node5', 'pathC']]

want to end here:

result = [['node1', 'pathA'], ['node2', 'pathA'],['node4', 'pathC'], ['node5', 'pathC']]

Answer 1

list1 = [ ['node1', 'pathA'], ['node2', 'pathA'], ['node3', 'pathB'], ['node4', 'pathC'], ['node5', 'pathA'] ]
result = [x for x in list1 if [y[1] for y in list1].count(x[1]) > 1]

EDIT: this should work better!