2 files changed, 23 insertions, 4 deletions
diff --git a/pygithub3/resources/base.py b/pygithub3/resources/base.py
index 4ca2aa3..7045529 100644
--- a/pygithub3/resources/base.py
+++ b/pygithub3/resources/base.py
@@ -1,10 +1,7 @@
 #!/usr/bin/env python
 # -*- encoding: utf-8 -*-
 
-try:
-    import simplejson as json
-except ImportError:
-    import json
+from pygithub3.core.utils import json
 
 
 class Resource(object):
diff --git a/pygithub3/resources/pull_requests.py b/pygithub3/resources/pull_requests.py
new file mode 100644
index 0000000..a28e0fe
--- /dev/null
+++ b/pygithub3/resources/pull_requests.py
@@ -0,0 +1,22 @@
+# -*- encoding: utf-8 -*-
+
+from .base import Resource
+
+
+class PullRequest(Resource):
+    _dates = ('created_at', 'updated_at', 'closed_at', 'merged_at')
+
+    def __str__(self):
+        return '<PullRequest (%s)>' % getattr(self, 'title', '')
+
+
+class File(Resource):
+    def __str__(self):
+        return '<File (%s)>' % getattr(self, 'filename', '')
+
+
+class Comment(Resource):
+    _dates = ('created_at', 'updated_at')
+
+    def __str__(self):
+        return '<Comment (#%s)>' % getattr(self, 'id', '')