Python iterations

Has anybody any idea why this code fails to run smooth? It seems not to like iterations with the yield keyword: I am trying to mine all the numbers from any level of lists or dicts ( especially interested in lists ). At the second iteration it finds [2,开发者_C百科3] but fails to print 2 and 3 one after other...Imagine also that I could have many levels of lists.

def digIn( x ):
    try:
        if isDict(x) or isList(x):
            print "X:", x
            for each in x:
                print "each:", each
                if isDict(each) or isList(each):
                    digIn(each)
                else:
                    yield each
        else:
            yield x
    except Exception,ex:
        print ex

print "STARTING OVER"
for i in digIn( [1,[2,3]] ):
    print i

---

You should 're-yield' the generator to iterate through all list elements recursively.

if isDict(each) or isList(each):
     for elem in digIn(each):
         yield elem
else:
     yield each

---

digIn(each) is incorrect. You must iterate over it, and yield each value in turn.

---

When you recursively call digIn the inner yields don't cause values to be yielded from the outer call. Instead the recursive digIn is returning a generator and then you are silently discarding that generator and losing the inner items.

You need to explicitly yield the results from the recursive call.

if isDict(each) or isList(each):
    for innerItem in digIn(each):
        yield innerItem
else:
    yield each