1 files changed, 22 insertions, 0 deletions
diff --git a/swiftclient/utils.py b/swiftclient/utils.py
index 2b208b9..9e43237 100644
--- a/swiftclient/utils.py
+++ b/swiftclient/utils.py
@@ -403,3 +403,25 @@ def normalize_manifest_path(path):
     if path.startswith('/'):
         return path[1:]
     return path
+
+
+class JSONableIterable(list):
+    def __init__(self, iterable):
+        self._iterable = iter(iterable)
+        try:
+            self._peeked = next(self._iterable)
+            self._has_items = True
+        except StopIteration:
+            self._peeked = None
+            self._has_items = False
+
+    def __bool__(self):
+        return self._has_items
+
+    __nonzero__ = __bool__
+
+    def __iter__(self):
+        if self._has_items:
+            yield self._peeked
+        for item in self._iterable:
+            yield item