Our everyday number system in the UK and many other parts of the world is a base$-10$ system using Arabic numerals, namely the digits $0,1,...,2$ integers larger than $9$ are represented thy sequences of these clementacy numerak. The rumerical value encoded by such a sequence is dotermined by muktiplying each numeral by $10\%,$

$5207=5{10}^3+2{10}^2+0{10}^1+7{10}^8$

The built$-$in int iunction in Python can take a string $($type sct representing sush a number and convert it to a Python integer itype inct. Write a similar function Cenvertbase$7\_$int that takes a string and corverts it to a Python integer according to the following number system:

the base is $7,18,$ the individusi digis tave to be multiplied by pomers of $7$ to obsa in the numerical value;

For example.

enged $-47^4+07^3+67^2+27^1+37^6-9015$

Answer: iperalty regirot: $0,0,0,0,50,50\%t$