Revert "AthenaPython/Bindings.py: Introduce typed nullptr to deal with return...

Revert "AthenaPython/Bindings.py: Introduce typed nullptr to deal with return values in case of failures"

This reverts commit c6375548.

Control/AthenaPython/python/Bindings.py

@@ -28,7 +28,6 @@ def _import_ROOT():
     import ROOT
     ROOT.gROOT.SetBatch(True)
     return ROOT
-
     
 ### data ----------------------------------------------------------------------
 
@@ -53,14 +52,6 @@ _clid_typename_aliases = {
     'Trk::SegmentCollection'        : 'DataVector<Trk::Segment>',
     }
 
-
-#Typed nullpointers:
-_import_ROOT()
-import cppyy
-svcNull=cppyy.bind_object(cppyy.nullptr,cppyy.gbl.IService)
-toolNull=cppyy.bind_object(cppyy.nullptr,cppyy.gbl.IAlgTool)
-algNull=cppyy.bind_object(cppyy.nullptr,cppyy.gbl.IAlgorithm)
-
 ### ---------------------------------------------------------------------------
 
 class _PyAthenaBindingsCatalog(object):
@@ -144,12 +135,9 @@ def py_svc(svcName, createIf=True, iface=None):
     if svcName in PyComponents.instances:
         svc = PyComponents.instances[svcName]
 
-    #Error handling: Convert c++ ptr to python-None
-    if svc == svcNull:
-        return None
-    
-    from AthenaPython import PyAthena
-    setattr(PyAthena.services, svcName, svc)
+    if svc:
+        from AthenaPython import PyAthena
+        setattr(PyAthena.services, svcName, svc)
     return svc
 
 ### helper method to easily retrieve tools from ToolSvc by name ---------------
@@ -199,12 +187,9 @@ def py_tool(toolName, createIf=True, iface=None):
     if toolName in PyComponents.instances:
         tool = PyComponents.instances[toolName]
 
-    #Error handling: Convert c++ ptr to python-None
-    if tool == toolNull:
-        return None
-
-    from AthenaPython import PyAthena
-    setattr(PyAthena.services.ToolSvc, toolName, tool)
+    if tool:
+        from AthenaPython import PyAthena
+        setattr(PyAthena.services.ToolSvc, toolName, tool)
     return tool
 
 ### helper method to easily retrieve algorithms by name -----------------------
@@ -247,12 +232,9 @@ def py_alg(algName, iface='IAlgorithm'):
     if algName in PyComponents.instances:
         alg = PyComponents.instances[algName]
 
-
-    if alg==algNull:
-        return None
-
-    from AthenaPython import PyAthena
-    setattr(PyAthena.algs, algName, alg)
+    if alg:
+        from AthenaPython import PyAthena
+        setattr(PyAthena.algs, algName, alg)
     return alg
 
 ### pythonizations for StoreGateSvc
@@ -855,7 +837,6 @@ def _setup():
     _register('DataLink',          _py_init_DataLink)
     _register('ElementLink',       _py_init_ElementLink)
     _register('ElementLinkVector', _py_init_ElementLinkVector)
-    
     pass
 
 ## execute method at module import