Try an except: after an import into "except ImportError".

This came out of SF bug #411881.

Note that there's another unqualified except: still.
diff --git a/Lib/zipfile.py b/Lib/zipfile.py
index 5dedc1b..6a7641f 100644
--- a/Lib/zipfile.py
+++ b/Lib/zipfile.py
@@ -7,7 +7,7 @@
 
 try:
     import zlib # We may need its compression method
-except:
+except ImportError:
     zlib = None
 
 __all__ = ["BadZipfile", "error", "ZIP_STORED", "ZIP_DEFLATED", "is_zipfile",