def overloaded$\_$add$($d$,$ key, value$)$:

$"""$

Adds the key value pair to the dictionary. If the key is already in the dictionary, the value is made a list and the new value is appended to it$.$

$>>>$ d $=\{"$Alice$"$: "Engineer"$\}$

$>>>$ overloaded$\_$add$($d$,$ "Bob", "Manager"$)$

$>>>$ overloaded$\_$add$($d$,$ "Alice", "Sales"$)$

$>>>$ d $==\{"$Alice$"$: $["$Engineer$",$ "Sales"$],$ "Bob": "Manager"$\}$

True

$"""$

#$-$ YOUR CODE STARTS HEREQuestion #$8$: overloaded$\_$add$($d$,$ key, value$)$

Given a dictionary $d,$ a key, and a value, this function adds the key:value pair to the dictionary $d.$

If the key doesn't already exist in the dictionary, this function should simply add it$.$ However, if

the key already exists, then rather than overriding the previous value, the dictionary should start

keeping a list of values for that key, in the order they are added.

Preconditions and Postconditions

$d$ : dict $$ You cannot make any assumptions about the size or contents of $d$

key: any immutable type

value: any

Returns: NoneExamples:

$)$ my$\_$dict $=\{"$Alice$"$: "Engineer"