not all arguments converted during string formatting

概述>>> cur.execute("INSERT INTO foo VALUES (%s)", "bar") # WRONG>>> cur.execute("INSERT INTO foo VALUES (%s)", ("bar")) # WRONG>>> cur.execute("INSERT INTO foo VALUES (%s)", ("bar",)) # correct>>>

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

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