A more convenient way to check on the trace function.

1 files changed, 4 insertions, 3 deletions

diff --git a/coverage/collector.py b/coverage/collector.py
index 96a9661..0cfd8ff 100644
--- a/coverage/collector.py
+++ b/coverage/collector.py
@@ -55,9 +55,10 @@ class PyTracer(object):
     def _trace(self, frame, event, arg_unused):
         """The trace function passed to sys.settrace."""
 
-        #print("trace event: %s %r @%d" % (
-        #           event, frame.f_code.co_filename, frame.f_lineno),
-        #      file=sys.stderr)
+        if 0:
+            sys.stderr.write("trace event: %s %r @%d\n" % (
+                event, frame.f_code.co_filename, frame.f_lineno
+            ))
 
         if self.last_exc_back:
             if frame == self.last_exc_back: