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-rw-r--r--mediagoblin/db/util.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/mediagoblin/db/util.py b/mediagoblin/db/util.py
index 38f0233f..52e97f6d 100644
--- a/mediagoblin/db/util.py
+++ b/mediagoblin/db/util.py
@@ -148,7 +148,7 @@ class RegisterMigration(object):
"""
def __init__(self, migration_number, migration_registry=MIGRATIONS):
assert migration_number > 0, "Migration number must be > 0!"
- assert not migration_registry.has_key(migration_number), \
+ assert migration_number not in migration_registry, \
"Duplicate migration numbers detected! That's not allowed!"
self.migration_number = migration_number