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-rw-r--r--lib/sqlalchemy/engine/url.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/engine/url.py b/lib/sqlalchemy/engine/url.py
index ee192d72a..e3629613f 100644
--- a/lib/sqlalchemy/engine/url.py
+++ b/lib/sqlalchemy/engine/url.py
@@ -81,7 +81,8 @@ class URL(object):
if self.database is not None:
s += '/' + self.database
if self.query:
- keys = sorted(self.query)
+ keys = list(self.query)
+ keys.sort()
s += '?' + "&".join("%s=%s" % (k, self.query[k]) for k in keys)
return s