Open addition.py and look at the definition of add:

def add$($a$,$ b$)$:

"Return the sum of a and b$"$

$"***$ YOUR CODE HERE $***"$

return $0$

The tests called this with a and b set to different values, but the code always returned zero. Modify this definition to read:

def add$($a$,$ b$)$:

"Return the sum of a and b$"$

print "Passed a$=\%$s and b$=\%$s$,$ returning a$+$b$=\%$s$"\%($a$,$b$,$a$+$b$)$

return a$+$b

Now rerun the autograder $($omitting the results for questions $2$ and $3)$:

$[$cs$188-$ta@nova ~$/$tutorial$]$$ python autograder.py $-$q q$1$

Starting on $1-21$ at $23$:$52$:$05$

Question q$1$

$===========$

Passed a$=1$ and b$=1,$ returning a$+$b$=2$

$***$ PASS: test$\_$cases$/$q$1/$addition$1.$test

$***$ add$($a$,$b$)$ returns the sum of a and b

Passed a$=2$ and b$=3,$ returning a$+$b$=5$

$***$ PASS: test$\_$cases$/$q$1/$addition$2.$test

$***$ add$($a$,$b$)$ returns the sum of a and b

Passed a$=10$ and b$=-2\mathrm{.}1,$ returning a$+$b$=7\mathrm{.}9$

$***$ PASS: test$\_$cases$/$q$1/$addition$3.$test

$***$ add$($a$,$b$)$ returns the sum of a and b

### Question q$1$: $1/1$ ###

Finished at $23$:$41$:$01$

Provisional grades

$==================$

Question q$1$: $1/1$

Question q$2$: $0/1$

Question q$3$: $0/1$

$------------------$

Total: $1/3$

You now pass all tests, getting full marks for question $1.$ Notice the new lines "Passed a$=..."$ which appear before $"***$ PASS: $...".$ These are produced by the print statement in add. You can use print statements like that to output information useful for debugging. You can also run the autograder with the option $--$mute to temporarily hide such lines, as follows:

$[$cs$188-$ta@nova ~$/$tutorial$]$$ python autograder.py $-$q q$1--$mute

Starting on $1-22$ at $14$:$15$:$33$

Question q$1$

$===========$

$***$ PASS: test$\_$cases$/$q$1/$addition$1.$test

$***$ add$($a$,$b$)$ returns the sum of a and b

$***$ PASS: test$\_$cases$/$q$1/$addition$2.$test

$***$ add$($a$,$b$)$ returns the sum of a and b

$***$ PASS: test$\_$cases$/$q$1/$addition$3.$test

$***$ add$($a$,$b$)$ returns the sum of a and b

### Question q$1$: $1/1$ ###