there is no itertools.imap in py3k

1 files changed, 5 insertions, 1 deletions

diff --git a/dedup/hashing.py b/dedup/hashing.py
index 0b7f889..1419811 100644
--- a/dedup/hashing.py
+++ b/dedup/hashing.py
@@ -1,4 +1,8 @@
 import itertools
+try:
+    from itertools import imap as map
+except ImportError:
+    pass # in python3 map is already imap
 
 class HashBlacklist(object):
     """Turn a hashlib-like object into a hash that returns None for some
@@ -50,7 +54,7 @@ class HashBlacklistContent(object):
         self.blacklist = blacklist
         if maxlen is None:
             # the chain avoids passing the empty sequence to max
-            maxlen = max(itertools.chain((0,), itertools.imap(len, blacklist)))
+            maxlen = max(itertools.chain((0,), map(len, blacklist)))
         self.maxlen = maxlen
         self.stored = b""