Bug fixes concerning obs and dim

onConfig.py

@@ -122,6 +122,8 @@ class OnConfig:
         # read a file if given
         self.read(dic=kwargs)
         
+        self.setObs(kwargs.pop('obs',None))
+        
         # evaluate the obervables if needed
         if kwargs.pop('initObservables',True):
             self.evaluate(dic=kwargs)
@@ -195,10 +197,6 @@ class OnConfig:
             dic.update(kwargs)
         else:
             dic=kwargs
-            
-        
-        self.obs=dic.pop('obs',self.obs)
-        self._normalizeObs()
         
         self.setDim(dic.pop('dim',None))
         self.binSize=dic.pop('binSize',self.binSize)
@@ -223,7 +221,7 @@ class OnConfig:
         tested. It might incidentally already work with other dimensions but 
         it is not supported by now.
         '''
-        if not dim is None:
+        if dim is None:
             return self
         
         self.dim=dim
@@ -305,7 +303,7 @@ class OnConfig:
                 elif len(obs[o])>=3:
                     if not iterTest(obs[o][1]):
                         raise Exception('obs[...][1] must be iterable.')
-                    if not iterTest(obs[o][2]):
+                    if not iterTest(obs[o][2]) and not obs[o][2] is None:
                         raise Exception('obs[...][2] must be iterable.')
                     obs[o]=obs[o][:3]
                     
@@ -403,6 +401,9 @@ class OnConfig:
         Method for (re-)setting or adding observables. See documentation of
         self._normalizeObservables() for details.
         '''
+        if obs is None:
+            return self
+        
         if not append:
             self.obs=obs
         else: