Please edit the python file to satisfied the $3$ questions:

Question $1$: Addition

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 using the following code:

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 re$-$run the autograder for only the question q$1.$

python

autograder.py $-qq1$

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$3$: $1/1$ ###

Finished at $22$:$54$:$31$

Provisional grades

Question q$3$: $1/1$

Total: $\frac{1}{1}$

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.

Question $2$: buyLotsOfFruit function

Add a buyLotsOfFruit$($orderList$)$ function to

buyLotsOfFruit.py which takes a list of $($fruit$,$pound$)$ tuples and returns the cost of your list. If there is some fruit in the list which doesn't appear in fruitPrices it should print an error message and return None. Please do not change the fruitPrices variable.

Total: $\frac{1}{1}$

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.

Question $2$: buyLotsOfFruit function

Add a buyLotsOfFruit$($orderList$)$ function to

buyLotsOfFruit.py which takes a list of $($fruit$,$pound$)$ tuples and returns the cost of your list. If there is some fruit in the list which doesn't appear in fruitPrices it should print an error message and return None. Please do not change the fruitPrices variable.

Run python

autograder.py until question $2$ passes all tests and you get full marks. Each test will confirm that buyLotsOfFruit$($orderList$)$ returns the correct answer given various possible inputs. For example, test$\_$cases$/$q$2/$food$\_$price$1.$test tests whether:

Cost of $[(\text{'}$apples$\text{'},2\mathrm{.}0),(\text{'}$pears$\text{'},3\mathrm{.}0),(\text{'}$limes$\text{'},4\mathrm{.}0)]$ is $12\mathrm{.}25$

Question $3$: shopSmart function

Fill in the function shopSmart$($orders$,$shops$)$ in

shopSmart.py$,$ which takes an orderList $($like the kind passed in to FruitShop.getPriceOfOrder$)$ and a list of FruitShop and returns the FruitShop where your order costs the least amount in total. Don't change the file name or variable names, please. Note that we will provide the

shop.py implementation as a "support" file, so you don't need to submit yours.

Run python

autograder.py until question $3$ passes all tests and you get full marks. Each test will confirm that shopSmart$($orders$,$shops$)$ returns the correct answer given various possible inputs. For example, with the following variable definitions:

orders 'apples', $1\mathrm{.}0),(\text{'}$oranges$\text{'},3\mathrm{.}0)$