Avoid registering nodes which were already visited
Avoid registering nodes which were already visited

cderici/pycket,cderici/pycket,samth/pycket,samth/pycket,pycket/pycket,magnusmorton/pycket,pycket/pycket,cderici/pycket,pycket/pycket,magnusmorton/pycket,samth/pycket,magnusmorton/pycket