Question #$7$: employee$\_$update$($d$,$ bonus, year$)10$ pts

Modifies the given dictionary d by adding another key:value assignment for all employees but

with a bonus for the next year. You can assume the previous year exists in the dictionary.

Preconditions and Postconditions

d: dict

bonus: int$/$float

year: int

Returns: dict $->$ adds the key:value pair with bonus applied

Recommended methods:

$$ dict.keys$(),$ returns all the keys in a dictionary

o D $=\{\text{'}$one$\text{'}$:$1,$ 'two':$2,$ 'three':$3,$ 'four':$4\})$

o D$.$keys$()$ returns $[\text{'}$one$\text{'},$ 'two', 'three', 'four'$]$

$$ List concatenation $(+)$ or append method

Tip: Dictionaries, just like lists, are mutable, so saving a reference to a dictionary, say x$=$d$[2020],$

mapping x to another key in d and then changing information in x$,$ will also change the data in

d$[2020],$ which is not a desirable behavior. When adding a new key, create new dictionaries and

lists and populate them with the required data.

Examples:

$>>>$ records $=\{$

$2020$:$\{"$John$"$:$["$Managing Director","Full$-$time",$65000],$"Sally":$["$HR Director","Full$-$

time",$60000],$"Max":$["$Sales Associate","Part$-$time",$20000]\},$

$2021$:$\{"$John$"$:$["$Managing Director","Full$-$time",$70000],$"Sally":$["$HR Director","Full$-$

time",$65000],$"Max":$["$Sales Associate","Part$-$time",$25000]\}\}$

$>>>$ employee$\_$update$($records$,7500,2022)$

$\{2020$: $\{\text{'}$John$\text{'}$: $[\text{'}$Managing Director', 'Full$-$time', $65000],$ 'Sally': $[\text{'}$HR Director', 'Full$-$

time', $60000],$ 'Max': $[\text{'}$Sales Associate', 'Part$-$time', $20000]\},$

$2021$: $\{\text{'}$John$\text{'}$: $[\text{'}$Managing Director', 'Full$-$time', $70000],$ 'Sally': $[\text{'}$HR Director', 'Full$-$

time', $65000],$ 'Max': $[\text{'}$Sales Associate', 'Part$-$time', $25000]\},$

$2022$: $\{\text{'}$John$\text{'}$: $[\text{'}$Managing Director', 'Full$-$time', $77500],$ 'Sally': $[\text{'}$HR Director', 'Full$-$

time', $72500],$ 'Max': $[\text{'}$Sales Associate', 'Part$-$time', $32500]\}\}$