18574: Fixes bug for keys without values.

[arvados.git] / sdk / python / arvados / arvfile.py

diff --git a/sdk/python/arvados/arvfile.py b/sdk/python/arvados/arvfile.py
index e915ff2ac0a37c86c635f9ce68f52d227fed1725..0fcdc1e6334957f27a5ff1f10fbdedcf2716609a 100644 (file)
--- a/sdk/python/arvados/arvfile.py
+++ b/sdk/python/arvados/arvfile.py
@@ -760,9 +760,10 @@ class _BlockManager(object):
         self._delete_bufferblock(locator)
 
     def _delete_bufferblock(self, locator):
-        bb = self._bufferblocks[locator]
-        bb.clear()
-        del self._bufferblocks[locator]
+        if locator in self._bufferblocks:
+            bb = self._bufferblocks[locator]
+            bb.clear()
+            del self._bufferblocks[locator]
 
     def get_block_contents(self, locator, num_retries, cache_only=False):
         """Fetch a block.