Defensive programming is the art of writing code that is robust because it explicitly takes account of potential errors. Consider the following example of defensive programming, where the aim is to call an existing function which processes keyboard input from a user.

def robust$\_$finder$()$:

try:

return finder$()$

except NameError:

print$("$Unknown value entered!"$)$

except TypeError:

print$("$Non$-$numeric value entered!"$)$

except SyntaxError:

print$("$Malformed expression!"$)$

except IndexError:

print$("$Index out of bounds!"$)$

Which of the following best describes the defensive programming approach taken by the writer of this code?