fixed some bugs

exam/ex01/cfg.py

@@ -1,6 +1,6 @@
 
 config = {
-	"use_sqlite": True
+	"use_sqlite": False
 	, "mysql_server": "172.17.0.2"
 	, "mysql_user": "wikipedia"
 	, "mysql_password": "wikipediastuff"

exam/ex01/graph.py

@@ -49,7 +49,13 @@ class DijkstraHelper(object):
 	def write_back(self, connection):
 		cursor = connection.cursor()
 		cursor.execute(sql.statements["delete_dijkstra"])
-		cursor.executemany(sql.statements["insert_dijkstra_values"], list(self._nodes.items()))
+
+		def sqlize(v):
+			if(config["use_sqlite"]):
+				return v
+			if(v == float("inf")):
+				return 2147483647
+		cursor.executemany(sql.statements["insert_dijkstra_values"], [(k, sqlize(v)) for k,v in self._nodes.items()])
 
 
 			

exam/ex01/main.py

@@ -29,4 +29,4 @@ angela = get_page_id("Angela_Merkel", cache)
 dijkstra = DijkstraHelper.from_db(cache)
 dijkstra.dijkstra(angela)
 dijkstra.write_back(cache)
-print(dijkstra._nodes)
+print({k:v for k,v in dijkstra._nodes.items() if v != float("inf")})