Gracefully throw a warning and carry on if we encounter an unimplemented OBJ statement

Author: Daniel Coelho

pywavefront/__init__.py

@@ -147,7 +147,3 @@ def parse_f(self, args):
             if i == 0:
                 v1 = vertex
             vlast = vertex
-
-    def parse_s(self, args):
-        # unimplemented
-        return

pywavefront/parser.py

@@ -63,5 +63,11 @@ def parse(self, line, dir):
                 args[i] = arg
             i += 1
 
-        parse_function = getattr(self, 'parse_%s' % line_type)
-        parse_function(args)
+        attrib = 'parse_%s' % line_type
+
+        if hasattr(self, attrib):
+            parse_function = getattr(self, attrib)
+            parse_function(args)
+        else:
+            print("[PyWavefront] WARNING: Unimplemented OBJ format statement \'%s\' on line \'%s\'"
+                  % (line_type, line.rstrip()))