question #$6$: invert $($d$)$

Given a Using concepts which you were specifically told not to use

$-100\%$ Use of global variables, break or continue statements in loops $($while these statements are useful to provide multiple exit points in loops, they are highly abused when starting to program instead of defining a meaningful continuation condition. None of the problems in this course involve complex exit points, hence, their use is prohibited in all components of this course$)$dictionary $d,$ create a new dictionary that is the invert of $d$ such that original key:value

pairs $i$:$j$ are now related $j$:$i,$ but when there are nonunique values $($j$\text{'}$s$)$ in $d,$ they should not be

included as a key:value pair in the inverted dictionary. Keys are case sensitive$.$ It returns the new

inverted dictionary.

Preconditions and Postconditions

d: dict

Returns: dict $->$ Inverted dictionary mapping value to key, excluding

non$-$unique values

You are NOT allowed to use the zip$()$ or enumerate$()$ methods. You will not get credit if you

used them in your code, even if your code passed the test cases.

Examples:

$>$ invert$(\{\text{'}$one$\text{'}$: $1,$ 'two':$2,$ 'uno': $1,$ 'dos': $2,$ 'three': $3\})$

$\{3$: 'three'$\}$

$)$ invert$(\{\text{'}$one$\text{'}$: $1,$ 'two': $2,$ 'three': $3,$ 'four': $4$