Question

I followed the top solution to Flattening an irregular list of lists in python (Flatten (an irregular) list of lists) using the following code:

def flatten(l):
    for el in l:
        if isinstance(el, collections.Iterable) and not isinstance(el, basestring):
            for sub in flatten(el):
                yield sub
        else:
            yield el


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

L=flatten(L)
print L

And got the following output:

“generator object flatten at 0x100494460”

I’m not sure which packages I need to import or syntax I need to change to get this to work for me.

Answer 1

You can iterate the generator object directly:

for x in L:
    print x

or if you truly need a list, you can make one from it:

list(L)