PEP8: fix E713: test for membership should be 'not in'

Signed-off-by: Joe Guo <joeg@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>

python/samba/samba3/__init__.py

@@ -337,7 +337,7 @@ class WinsDatabase(object):
                 ips.append(entries[i])
                 i += 1
             nb_flags = int(entries[i][:-1], 16)
-            assert not name in self.entries, "Name %s exists twice" % name
+            assert name not in self.entries, "Name %s exists twice" % name
             self.entries[name] = (ttl, ips, nb_flags)
         f.close()