Minor fix

boxmox/experiment.py

@@ -33,7 +33,7 @@ class ExampleData:
         self.path = path
         self.files = { x.replace(".csv", ""): os.path.join(self.path, x) for x in os.listdir(self.path) if '.csv' in x }
 
-examples = { x: ExampleData(os.path.join(examplesPath, x)) for x in os.listdir(examplesPath) }
+examples = { x: ExampleData(os.path.join(examplesPath, x)) for x in os.listdir(examplesPath) if os.path.isdir( os.path.join(examplesPath, x))}
 
 class Namelist:
     '''