sqlalchemy.exc.InternalError: (pymysql.err.InternalError)
sqlalchemy.exc.InternalError: (pymysql.err.InternalError) (1170, “BLOB/TEXT column ‘teacher’ used in key specification without a key length”) 这个是指你该表单里面的某一column的格式问题，比如这个就是TEXT错误 sqlalchemy.exc.Inter
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