not all arguments converted during string formatting

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>>> @H_301_3@cur.execute("INSERT INTO foo VALUES (%s)"@H_301_3@,"bar"@H_301_3@)    # WRONG@H_301_3@
>>> @H_301_3@cur.execute("INSERT INTO foo VALUES (%s)"@H_301_3@,("bar"@H_301_3@))  # WRONG@H_301_3@
>>> @H_301_3@cur.execute("INSERT INTO foo VALUES (%s)"@H_301_3@,("bar"@H_301_3@,)) # correct@H_301_3@
>>> @H_301_3@cur.execute("INSERT INTO foo VALUES (%s)"@H_301_3@,["bar"@H_301_3@])  # correct@H_301_3@

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