pylint: Fix used-before-assignment
    
    > Emitted when a local variable is accessed before its assignment took
    place. Assignments in try blocks are assumed not to have occurred when
    evaluating associated except/finally blocks. Assignments in except
    blocks are assumed not to have occurred when evaluating statements
    outside the block, except when the associated try block contains a
    return statement.
    
    Fixes: https://pagure.io/freeipa/issue/9278
    Signed-off-by: Stanislav Levin <slev@altlinux.org>
    Reviewed-By: Stanislav Levin <slev@altlinux.org>