Pytesseract cannot recognize the cut CAPTCHA picture.

PIL.Image.openpytesseract.image_to_stringmare
and then using image_to_string recognition can only return a blank string. What is the reason?

Mar.18,2021
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-64f5-1e474a7-43b9a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e474a7-43b9a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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