dbname = "test"
cursor.execute(cursor.mogrify("DROP DATABASE %s;"), (dbname,))

cursor.execute("DROP DATABASE %s;", (dbname,))

Error syntax error at or near "'test'"
LINE 1: DROP DATABASE 'test';

from psycopg2.extensions import AsIs
...
cursor.execute("DROP TABLE %(table)s", {"table": AsIs("my_table")})