Do not handle engine errors in hint functions

Such errors are now handled in server.prolog_session.

9 files changed, 0 insertions, 27 deletions

diff --git a/prolog/problems/family_relations/ancestor_2/common.py b/prolog/problems/family_relations/ancestor_2/common.py
index 150e2f0..ec44d41 100644
--- a/prolog/problems/family_relations/ancestor_2/common.py
+++ b/prolog/problems/family_relations/ancestor_2/common.py
@@ -71,11 +71,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # gender testing is redundant
         # this is not necessarily wrong, but worth mentioning anyway
diff --git a/prolog/problems/family_relations/aunt_2/common.py b/prolog/problems/family_relations/aunt_2/common.py
index 9ac91ea..d2051b0 100644
--- a/prolog/problems/family_relations/aunt_2/common.py
+++ b/prolog/problems/family_relations/aunt_2/common.py
@@ -75,11 +75,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # X and Y mixed up
         # warning: knowledge base dependent
diff --git a/prolog/problems/family_relations/brother_2/common.py b/prolog/problems/family_relations/brother_2/common.py
index a370baa..2b45b53 100644
--- a/prolog/problems/family_relations/brother_2/common.py
+++ b/prolog/problems/family_relations/brother_2/common.py
@@ -69,11 +69,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # X must be male
         if prolog.engine.ask_truth(engine_id, 'female(X), brother(X, _)'):
diff --git a/prolog/problems/family_relations/cousin_2/common.py b/prolog/problems/family_relations/cousin_2/common.py
index 16a639c..68c4b34 100644
--- a/prolog/problems/family_relations/cousin_2/common.py
+++ b/prolog/problems/family_relations/cousin_2/common.py
@@ -82,11 +82,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # gender testing is redundant
         # this is not necessarily wrong, but worth mentioning anyway
diff --git a/prolog/problems/family_relations/descendant_2/common.py b/prolog/problems/family_relations/descendant_2/common.py
index 44eb605..0963994 100644
--- a/prolog/problems/family_relations/descendant_2/common.py
+++ b/prolog/problems/family_relations/descendant_2/common.py
@@ -71,11 +71,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # gender testing is redundant
         # this is not necessarily wrong, but worth mentioning anyway
diff --git a/prolog/problems/family_relations/father_2/common.py b/prolog/problems/family_relations/father_2/common.py
index 400c91b..802193d 100644
--- a/prolog/problems/family_relations/father_2/common.py
+++ b/prolog/problems/family_relations/father_2/common.py
@@ -72,11 +72,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # OR (;) instead of AND (,)
         # this hint has to be before the next two
diff --git a/prolog/problems/family_relations/grandparent_2/common.py b/prolog/problems/family_relations/grandparent_2/common.py
index 1657509..ff94f31 100644
--- a/prolog/problems/family_relations/grandparent_2/common.py
+++ b/prolog/problems/family_relations/grandparent_2/common.py
@@ -73,11 +73,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # TODO: generic hint for:
         # TODO: parent(X, Z1), parent(Z2, Y), Z1 = Z2
diff --git a/prolog/problems/family_relations/mother_2/common.py b/prolog/problems/family_relations/mother_2/common.py
index 21bf300..2fb2722 100644
--- a/prolog/problems/family_relations/mother_2/common.py
+++ b/prolog/problems/family_relations/mother_2/common.py
@@ -73,11 +73,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # OR (;) instead of AND (,)
         # this hint has to be before the next two
diff --git a/prolog/problems/family_relations/sister_2/common.py b/prolog/problems/family_relations/sister_2/common.py
index b09b29a..6a1a745 100644
--- a/prolog/problems/family_relations/sister_2/common.py
+++ b/prolog/problems/family_relations/sister_2/common.py
@@ -95,11 +95,8 @@ def hint(program, solved_problems):
             server.problems.solutions_for_problems('prolog', solved_problems) + '\n' +
             server.problems.load_facts('prolog', facts).facts)
 
-    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code, timeout=1.0)
-        if not engine_id:
-            raise Exception('Prolog engine failed to create.')
 
         # X must be female
         if prolog.engine.ask_truth(engine_id, 'male(X), sister(X, _)'):