Added KNN

[ramyashreeshetty]

fixes #9

Description

KNN

Type of change

Note: Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Documentation update
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New layer/algorithm
• Other (Specify)

Implementation details

(only for New layer/algorithm)

• List all the packages and their versions used:
  numpy==1.21.5
  pandas==1.4.2
  sklearn==1.0.2
• Include test results such as:
  Accuracy score:0.93
  Precision score: 0.8787878787878788
  Recall score: 0.90625

Checklist

• I have performed a self code_review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.

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[HemanthSai7]

Hi @ramyashreeshetty Thank you for the PR. But looks like you have used sklearn and imported KNeighborsClassifier. But instead, you have to implement it from scratch.

[ramyashreeshetty]

@HemanthSai7 i understand, i'll implement kneighborsclassifier from scratch.

[ramyashreeshetty]

@HemanthSai7 hey i have updated it! could u review it

[HemanthSai7]

@ramyashreeshetty Looks gr8!🔥. Could you please document your code. Have a look at the logistic regression notebook.
Thanks.

[ramyashreeshetty]

@HemanthSai7 i have added it.

[HemanthSai7]

LGTM🔥