Merge pull request #68 from tebeka/master

use not instead of ~

Author: catherinedevlin

src/sql/magic.py

@@ -86,7 +86,7 @@ def execute(self, line, cell='', local_ns={}):
         try:
             result = sql.run.run(conn, parsed['sql'], self, user_ns)
 
-            if result is not None and ~isinstance(result, str) and self.column_local_vars:
+            if result is not None and not isinstance(result, str) and self.column_local_vars:
                 #Instead of returning values, set variables directly in the
                 #users namespace. Variable names given by column names