add 'decrby' method

1 files changed, 10 insertions, 0 deletions

diff --git a/redis/client.py b/redis/client.py
index c99b817..3acfb9f 100755
--- a/redis/client.py
+++ b/redis/client.py
@@ -824,6 +824,16 @@ class StrictRedis(object):
         """
         return self.execute_command('DECRBY', name, amount)
 
+    def decrby(self, name, amount=1):
+        """
+        Decrements the value of ``key`` by ``amount``.  If no key exists,
+        the value will be initialized as 0 - ``amount``
+        """
+
+        # An alias for ``decr()``, because it is already implemented
+        # as DECRBY redis command.
+        return self.decr(name, amount)
+
     def delete(self, *names):
         "Delete one or more keys specified by ``names``"
         return self.execute_command('DEL', *names)