only try importing uuid once

Author: Mike Dirolf

pymongo/bson.py

@@ -36,6 +36,12 @@
 except ImportError:
  _use_c = False
 
+try:
+ import uuid
+ _use_uuid = True
+except ImportError:
+ _use_uuid = False
+
 
 def _get_int(data):
  try:
@@ -256,12 +262,8 @@ def _get_binary(data):
  if length2 != length - 4:
  raise InvalidBSON("invalid binary (st 2) - lengths don't match!")
  length = length2
- if subtype == 3:
- try:
- import uuid
- return (uuid.UUID(bytes=data[:length]), data[length:])
- except ImportError:
- pass
+ if subtype == 3 and _use_uuid:
+ return (uuid.UUID(bytes=data[:length]), data[length:])
  return (Binary(data[:length], subtype), data[length:])