exception handling

minetestmapper-numpy.py

@@ -464,11 +464,12 @@ class LVLDB:
 
     def __iter__(self):
         for k in self.conn.RangeIter():
-            if k is not None and len(k)>0:
+            #if k is not None and len(k)>0:
+            try:
                 x, y, z = getIntegerAsBlock(int(k[0]))
                 yield x, y, z, k[0]
-            else:
+            except:
-                print("WARNING: no data at first index in value '"+str(k))
+                print("WARNING: no int at first index in value '"+str(k))
 
     def get(self, pos):
         return BytesIO(self.conn.Get(pos))