android debugging plus clean-ups

packages/swig/python/demo.py

@@ -3,20 +3,31 @@
 import sys
 import yap
 
+#
+# initialize engine
 engine = yap.YAPEngine();
 # engine = yap.YAPEngine(yap.YAPParams());
 
-def go():
-    while True:
-        s = raw_input("Prolog Query: ")
-        q = engine.query(s)
-        while q.next():
-            vs = q.namedVars();
-            if vs.length() == 0:
-              print "yes"
-            else:
-                while vs.length() > 0:
-                    eq = vs.car()
-                    print eq.getArg(1).text() + " = " + eq.getArg(2).text()
-                    vs = vs.cdr()
-        print "no more answers"
+def query( s ):
+    q = engine.query(s)
+    while q.next():
+        vs = q.namedVars()
+        if vs.length() == 0:
+            print( "yes" )
+            return
+        else:
+            while vs.length() > 0:
+                eq = vs.car()
+                print( eq.getArg(1).text() + " = " + eq.getArg(2).text() )
+                vs = vs.cdr()
+            s = raw_input("next: ?")
+            if s.find(';') != 0 :
+                return
+    print( "no more answers" )
+    return
+
+def live():
+    loop = True
+    while loop:
+        s = raw_input("?- ")
+        query( s )