From b5a62c5c96f95b78c3c4350943c477e4070818c3 Mon Sep 17 00:00:00 2001
From: Miguel Barão <miguel.barao@gmail.com>
Date: Sun, 24 Sep 2017 23:41:44 +0100
Subject: [PATCH] - fixed code to run with networkx 2.0

---
 BUGS.md      |  1 +
 app.py       |  5 ++---
 knowledge.py | 12 ++++++------
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/BUGS.md b/BUGS.md
index 44b2ed3..8c60ef2 100644
--- a/BUGS.md
+++ b/BUGS.md
@@ -24,6 +24,7 @@ TODO:
 
 FIXED:
 
+- ver documentacao de migracao para networkx 2.0 https://networkx.github.io/documentation/stable/release/migration_guide_from_1.x_to_2.0.html
 - script para adicionar users/reset passwords.
 - os topicos locked devem estar inactivos no sidebar.
 - enter faz GET /question, que responde com json no ecran. (solution: disabled enter)
diff --git a/app.py b/app.py
index dacb47e..1b0c610 100644
--- a/app.py
+++ b/app.py
@@ -39,7 +39,6 @@ class LearnApp(object):
 
         self.depgraph = build_dependency_graph(conffile)
 
-
         # connect to database and check registered students
         self.db_setup(self.depgraph.graph['database'])
 
@@ -153,7 +152,7 @@ class LearnApp(object):
     def db_add_topics(self):
         with self.db_session() as s:
             tt = [t[0] for t in s.query(Topic.id)]  # db list of topics
-            nn = self.depgraph.nodes_iter() # topics in the graph
+            nn = self.depgraph.nodes() # topics in the graph
             s.add_all([Topic(id=n) for n in nn if n not in tt])
 
     # ------------------------------------------------------------------------
@@ -276,7 +275,7 @@ def build_dependency_graph(config_file):
 
     # iterate over topics and create question factories
     logger.info('Loading:')
-    for tref in g.nodes_iter():
+    for tref in g.nodes():
         tnode = g.node[tref]  # current node (topic)
         fullpath = path.expanduser(path.join(prefix, tref))
         filename = path.join(fullpath, 'questions.yaml')
diff --git a/knowledge.py b/knowledge.py
index 180eb9a..9f30a46 100644
--- a/knowledge.py
+++ b/knowledge.py
@@ -33,8 +33,8 @@ class Knowledge(object):
 
         self.state = state # {'topic_id': {'level':0.5, 'date': datetime}, ...}
 
-        # compute recommended sequence of topics  ['a', 'b',...]
-        self.topic_sequence = nx.topological_sort(self.depgraph)
+        # compute recommended sequence of topics  ['a', 'b', ...]
+        self.topic_sequence = list(nx.topological_sort(self.depgraph))
 
         # select a topic to do and initialize questions
         self.start_topic()
@@ -44,15 +44,15 @@ class Knowledge(object):
     # If all levels > 0.8, will stay in the last one forever...
     # ------------------------------------------------------------------------
     def start_topic(self, topic=''):
-        # unlock topics that have satisfied dependencies
-        unlock_topics = []
+        # unlock topics whose dependencies are done
+        unlocked_topics = []
         for t in self.topic_sequence:
             if t not in self.state:  # is locked
                 deps = self.depgraph.predecessors(t)
                 if all(d in self.state and self.state[d]['level'] > 0.01 for d in deps): # dependencies done
-                    unlock_topics.append(t)
+                    unlocked_topics.append(t)
 
-        for t in unlock_topics:
+        for t in unlocked_topics:
             self.state[t] = {'level': 0.0, 'date': datetime.now()}
             logger.info(f'User "{self.student}" unlocked "{t}"')
 
--
libgit2 0.21.2