Change order of attributes.

cml/domain/reconstruction.py

@@ -60,12 +60,10 @@ class PragmaticMachineLearningModel:
                  meta: Metadata,
                  model,
                  learnblock):
-        if meta.pre_image == 400:
-            raise Exception
         self.meta = meta
         self.model = model
-        self.learnblock = learnblock if self.tier > 1 else None
         self.origin = learnblock.origin
+        self.learnblock = learnblock if self.tier > 1 else None
 
     def __str__(self) -> str:
         return self.uid
@@ -247,7 +245,7 @@ class Reconstructor:
                     meta: Metadata = None) -> PragmaticMachineLearningModel:
 
         # Check if learnblock has enough features
-        if not (learnblock.learn_cols > 0):
+        if not (learnblock.learn_cols >= 2):
             raise NotEnoughFeaturesWarning()
 
         # Specify the models which should be trained
@@ -445,4 +443,3 @@ def determine_winner(
             winner = model
 
     return winner
-