Fix standalone node bug

Author: qballand

CHANGELOG.md

@@ -4,7 +4,8 @@
 (Released : April 30, 2021) : tag 1.2.0
 * Add sub_graph
 * Fix bug (forced to set an id on GraphNode constructor)
-
+* Fix bug (standalone node without graph visitation failed)
+	
 ## Version 1.1.0
 (Released : April 16, 2021) : tag 1.1.0
 * Fix documentation

freexgraph/_version.py

@@ -21,4 +21,4 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-__version__ = "1.2.0"
+__version__ = "1.2.1"

freexgraph/visitor.py

@@ -36,6 +36,8 @@ def _get_len(sorted_node_list: List[Tuple], with_progress_bar: bool) -> int:
 
 
 def _filter_graph_root_for_visitation(root: FreExNode, is_reversed: bool):
+    if root.graph_ref is None:
+        return [root]
     depth: int = root.depth
     sorted_node_list = list(nx.lexicographical_topological_sort(root.graph_ref))
     if is_reversed:
@@ -98,7 +100,10 @@ def apply_visitation_(self, root: FreExNode) -> bool:
         ) as pbar:
             pbar.set_description(f"Processing Visitor {type(self).__name__}")
             for node_id in sorted_node_list:
-                node = root.graph_ref.nodes[node_id]["content"]
+                if len(sorted_node_list) == 1:
+                    node = root
+                else:
+                    node = root.graph_ref.nodes[node_id]["content"]
 
                 # Trigger custom hook
                 for predicate, hook in self.__custom_hooks:

recipe.nix

@@ -3,7 +3,7 @@
 
 python38.pkgs.buildPythonPackage rec {
   pname = "freexgraph";
-  version = "1.2.0";
+  version = "1.2.1";
 
   src = if (builtins.isNull use_revision || use_revision == "") then
     nix-gitignore.gitignoreSource [ ".git" ] ./.