i$\text{'}$m not sure what is causing the issue here. this assignment is due early tomorrow morning so any and all help is appreciated $)$: $```$

def update$\_$quantity$($inventory$,$ item$\_$list, quantity$\_$list$)$:

for i in range$($len$($item$\_$list$))$:

item $=$ item$\_$list$[$i$]$

quantity $=$ quantity$\_$list$[$i$]$

if item in inventory:

index $=$ inventory.index$($item$)$

inventory$[$index $+1]+=$ quantity

else:

inventory.append$($item$\_$list$)$

inventory.append$($quantity$\_$list$)$

return inventory

$``````$

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

Traceback $($most recent call last$)$:

File $"/$Users$/$trippydooda$/$Downloads$/$tester$3.$py$",$ line $340,$ in test$\_$update$\_$quantity$\_8$

$```$

$```$

First list contains $2$ additional elements.

First extra element $8$:

'Apple'

$-[\text{'}$Orange$\text{'},20,$ 'Bread', $50,$ 'Banana', $50,$ 'Milk', $80,$ 'Apple', $50]$

$?$

$+[\text{'}$Orange$\text{'},20,$ 'Bread', $50,$ 'Banana', $50,$ 'Milk', $80]$

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

FAIL: test$\_$update$\_$quantity$\_9(\_\_$main$\_\_.$AllTests.test$\_$update$\_$quantity$\_9)$

Traceback $($most recent call last$)$:

File $"/$Users$/$trippydooda$/$Downloads$/$tester$3.$py$",$ line $344,$ in test$\_$update$\_$quantity$\_9$

self.assertEqual$($update$\_$quantity$($lst$,[\text{'}$Apple$\text{'},$'Milk','Bread', 'Banana','Orange'$],[1,1,1,1,0]),[\text{'}$Orange$\text{'},0,$ 'Bread', $1,$ 'Banana', $1])$

AssertionError: Lists differ: $[\text{'}$Orange$\text{'},0,$ 'Bread', $1,$ 'Banana', $1,$ 'Apple', $1,$ 'Milk', $1]!=[\text{'}$Orange$\text{'},0,$ 'Bread', $1,$ 'Banana', $1]$

First list contains $4$ additional elements.

First extra element $6$:

'Apple'

$\_[\text{'}$Orange$\text{'},0,$ 'Bread', $1,$ 'Banana', $1,$ 'Apple', $1,$ 'Milk', $1]$

$?$

$+[\text{'}$Orange$\text{'},0,$ 'Bread', $1,$ 'Banana', $1]$

$```$