core: optimize renderer computing

This just use if/elif/else to do the proper renderer finding once and
for all.

Change-Id: I5e754afad2a7ce64e692d6898a9cf9eed5a7e94c

1 files changed, 8 insertions, 7 deletions

diff --git a/pecan/core.py b/pecan/core.py
index 173210b..af5d943 100644
--- a/pecan/core.py
+++ b/pecan/core.py
@@ -390,18 +390,19 @@ class PecanBase(object):
         return args, varargs, kwargs
 
     def render(self, template, namespace):
-        renderer = self.renderers.get(
-            self.default_renderer,
-            self.template_path
-        )
         if template == 'json':
             renderer = self.renderers.get('json', self.template_path)
-        if ':' in template:
+        elif ':' in template:
+            renderer_name, template = template.split(':', 1)
+            renderer = self.renderers.get(
+                renderer_name,
+                self.template_path
+            )
+        else:
             renderer = self.renderers.get(
-                template.split(':')[0],
+                self.default_renderer,
                 self.template_path
             )
-            template = template.split(':')[1]
         return renderer.render(template, namespace)
 
     def find_controller(self, state):