How do I get the value of a variable with a specified name? What should I ask?

like PHP can do this:

a = "var"
class test:
    var = "value"
T = test()
t ??? a : value
Mar.29,2021
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-64f5-1b3c76d-2b67b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3c76d-2b67b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?