python - How to fix ValueError: need more than 1 value to unpack? -

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i following error when using below query,am giving variables when doing cursor.fetchall ,not sure why getting error,how overcome this?

query:-

query = """select metabuild,testbed gerrits.pw warehouse ='%s'"""%(warehouse_name) rows  = cursor.execute(query) (metabuild,testbed)= cursor.fetchall()

error:-

    (metabuild,testbed)= cursor.fetchall() valueerror: need more 1 value unpack

fetchall returns list of tuples, 1 tuple per row. if query returns 1 row, do

(metabuild,testbed)= cursor.fetchall()[0]

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