add JsonPointer.contains()

1 files changed, 6 insertions, 0 deletions

diff --git a/jsonpointer.py b/jsonpointer.py
index fe3cecf..80d5b50 100644
--- a/jsonpointer.py
+++ b/jsonpointer.py
@@ -265,6 +265,12 @@ class JsonPointer(object):
 
 
 
+    def contains(self, ptr):
+        """" Returns True if self contains the given ptr """
+        return len(self.parts) > len(ptr.parts) and \
+             self.parts[:len(ptr.parts)] == ptr.parts
+
+
 def pairwise(iterable):
     "s -> (s0,s1), (s1,s2), (s2, s3), ..."
     a, b = tee(iterable)