Python 2.5 compatibility #261

1 files changed, 8 insertions, 2 deletions

diff --git a/debug_toolbar/utils/__init__.py b/debug_toolbar/utils/__init__.py
index bfb485c..2d2ff10 100644
--- a/debug_toolbar/utils/__init__.py
+++ b/debug_toolbar/utils/__init__.py
@@ -56,9 +56,15 @@ def render_stacktrace(trace):
     stacktrace = []
     for frame in trace:
         params = map(escape, frame[0].rsplit(os.path.sep, 1) + list(frame[1:]))
+        params_dict = dict((unicode(idx), v) for idx, v in enumerate(params))
         try:
-            stacktrace.append(u'<span class="path">{0}/</span><span class="file">{1}</span> in <span class="func">{3}</span>(<span class="lineno">{2}</span>)\n  <span class="code">{4}</span>'.format(*params))
-        except IndexError:
+            stacktrace.append(u'<span class="path">%(0)s/</span>'
+                              u'<span class="file">%(1)s</span>'
+                              u' in <span class="func">%(3)s</span>'
+                              u'(<span class="lineno">%(2)s</span>)\n'
+                              u'  <span class="code">%(4)s</span>'
+                              % params_dict)
+        except KeyError:
             # This frame doesn't have the expected format, so skip it and move on to the next one
             continue
     return mark_safe('\n'.join(stacktrace))