change the graph class by a good one

src/jflow/workflow.py

@@ -35,7 +35,7 @@ from inspect import getcallargs
 import jflow
 import jflow.utils as utils
 from jflow.utils import validate_email
-from jflow.graph import Graph
+from pygraph.classes.graph import graph
 from jflow.workflows_manager import WorkflowsManager, JFlowConfigReader
 from jflow.utils import get_octet_string_representation, get_nb_octet
 from jflow.parameter import *
@@ -288,15 +288,16 @@ class Workflow(threading.Thread):
             self.__setattr__(param.name, new_param)
 
     def get_execution_graph(self):
-        graph = Graph(graph_dict={})
+        gr = digraph()
+        for cpt in self.components:
+            gr.add_nodes([cpt.get_nameid()])
         for cpt in self.components:
-            graph.add_vertex(cpt.get_nameid())
             for ioparameter in cpt.__dict__.values():
-                if ( issubclass( ioparameter.__class__, InputFile ) or issubclass( ioparameter.__class__, OutputFile) 
-                     or issubclass( ioparameter.__class__, InputFileList) or issubclass( ioparameter.__class__, OutputFileList) ):
+                if ( issubclass( ioparameter.__class__, InputFile ) or issubclass( ioparameter.__class__, InputFileList)):
                     for pc_nameid in ioparameter.parent_component_nameid:
-                        graph.add_edge({ioparameter.component_nameid, pc_nameid})
-        return graph
+                        try: gr.add_edge((pc_nameid, ioparameter.component_nameid))
+                        except: pass
+        return gr
 
     def set_stderr(self):
         if hasattr(self, "stderr") and self.stderr is not None: