re-applied changes from heatherleaf@c65dffd, cf nltk#670

sadovnychyi · May 20, 2014 · 045e481 · 045e481
1 parent 2266fa4
commit 045e481
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/nltk/parse/chart.py b/nltk/parse/chart.py
@@ -1329,7 +1329,8 @@ def chart_parse(self, tokens, trace=None):
                 edge = agenda.pop()
                 for rule in inference_rules:
                     new_edges = list(rule.apply(chart, grammar, edge))
-                    trace_new_edges(chart, rule, new_edges, trace, trace_edge_width)
+                    if trace:
+                        trace_new_edges(chart, rule, new_edges, trace, trace_edge_width)
                     agenda += new_edges
 
         else: