Is there any driver expression for elif statement? Is there any way to add if elif and else in drivers?

Given the way we do if and else, here are two examples out of few other things i tried to get the statement right but unable to do so:

var-3.5 if (var&lt;0) var+3.5 elif (var&gt;0) else 1

var-3.5 if (var&lt;0) elif var+3.5 (var&gt;0) else 1


And also if there's any other way to add multiple if/else similarly?
Nest the ternary conditional operator

(var + 3.5) if var &gt; 0 else (var - 3.5) if var &lt; 0 else 1


or for more detailed scripts

import bpy

def x(var):
    if var &gt; 0:
        return var + 3.5
    elif var &lt; 0:
         return var - 3.5
    else:
         return 1

bpy.app.driver_namespace["x"] = x


And then use x(var) as your driver expression.