How to solve the problem of (Python) SyntaxError: Non-ASCII character once and for all

this problem works fine after I add code to the first line, but do I have to pay attention to this every time? Python novice asks

Feb.26,2021

python2 when Chinese appears in your file, you must add
python3 once and for all

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-64f5-1b2bfbe-2a820.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2bfbe-2a820.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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