With regard to the positioning of iframe in selenium python, what if the ID of irame is also dynamic?

want to achieve selenium login, but how can not navigate to the account password input box, tried a lot of methods did not work.
even this iframe is dynamic

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eaed66-47fd0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eaed66-47fd0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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