python - Pythong递归函数不返回

Question

def browseTags2(path,filter):
    try:
        results = system.tag.browse(path)
        for branch in results.getResults():
            if str(branch['tagType']) == 'Folder':
                browseTags2(branch['fullPath'],filter) #I tried adding a return here but then i get no results at all
        results = system.tag.browse(path,filter)
        for r in results.getResults():
            TagPath = str(r['fullPath'])
            print TagPath #If I change this to return I get none