Run this self test cell to check your code def knn classifier test 0 ( ) test if output is a numpy array, and of the right length X np array ( 1 , 0 , 0 , 1 , 0 , 1 , 0 , 1 ) T y np array ( 1 , 1 , 2 , 2 ) preds knnclassifier ( X , y , X , 1 ) return type ( preds ) np ndarray and preds shape ( 4 , ) def knn classifier test 1 ( ) X np array ( 1 , 0 , 0 , 1 , 0 , 1 , 0 , 1 ) T y np array ( 1 , 1 , 2 , 2 ) np testing assert allclose ( knnclassifier ( X , y , X , 1 ) , y ) return np testing assert allclose def knn classifier test 2 ( ) X np array ( 1 , 0 , 0 , 1 , 0 , 1 , 0 , 1 ) T y np array ( 1 , 1 , 2 , 2 ) y 2 np array ( 2 , 2 , 1 , 1 ) return np array equal ( knnclassifier ( X , y , X , 3 ) , y 2 ) def knn classifier test 3 ( ) X np array ( 4 , 3 , 2 , 2 , 3 , 4 ) T y np array ( 1 , 1 , 1 , 2 , 2 , 2 ) X 2 np array ( 1 , 1 ) T y 2 np array ( 1 , 2 ) return np array equal ( knnclassifier ( X , y , X 2 , 2 ) , y 2 ) def knn classifier test 4 ( ) X np array ( 4 , 3 , 2 , 2 , 3 , 4 ) T y np array ( 1 , 1 , 1 , 2 , 2 , 2 ) X 2 np array ( 0 , 1 ) T y 2 np array ( 1 , 2 ) y 3 np array ( 2 , 2 ) return np array equal ( knnclassifier ( X , y , X 2 , 2 ) , y 2 ) or np array equal ( knnclassifier ( X , y , X 2 , 2 ) , y 3 ) def knn classifier test 5 ( ) X np random rand ( 4 , 4 ) y np array ( 1 , 2 , 2 , 2 ) return accuracy ( knnclassifier ( X , y , X , 1 ) , y ) 1 def knn classifier test 6 ( ) X np random rand ( 4 , 4 ) y np array ( 1 , 2 , 1 , 2 ) return accuracy ( knnclassifier ( X , y , X , 1 ) , y ) 1 def knn classifier test 7 ( ) X np random rand ( 1 0 , 1 0 0 ) y np round ( np random rand ( 1 0 ) ) astype ( ' int ' ) return accuracy ( knnclassifier ( X , y , X , 1 ) , y ) 1 runtest ( knn classifier test 1 , ' knn classifier test 1 ' ) runtest ( knn classifier test 2 , ' knn classifier test 2 ' ) runtest ( knn classifier test 3 , ' knn classifier test 3 ' ) runtest ( knn classifier test 4 , ' knn classifier test 4 ' ) runtest ( knn classifier test 5 , ' knn classifier test 5 ' ) runtest ( knn classifier test 6 , ' knn classifier test 6 ' ) runtest ( knn classifier test 7 , ' knn classifier test 7 ' )

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Question: # Run this self - test cell to check your code def knn _ classifier _ test 0 ( ) : # test if output

# Run this self

-

test cell to check your code

def knn

_

classifier

_

test

0 ()

# test if output is a numpy array, and of the right length

=

.

array

([[1, 0, 0, 1], [0, 1, 0, 1]]) .

=

.

array

([1, 1, 2, 2])

preds

=

knnclassifier

(

,

,

, 1)

return type

(

preds

) = =

.

ndarray and preds.shape

= = (4,)

def knn

_

classifier

_

test

1 ()

=

.

array

([[1, 0, 0, 1], [0, 1, 0, 1]]) .

=

.

array

([1, 1, 2, 2])

.

testing.assert

_

allclose

(

knnclassifier

(

,

,

, 1),

)

return np

.

testing.assert

_

allclose

def knn

_

classifier

_

test

2 ()

=

.

array

([[1, 0, 0, 1], [0, 1, 0, 1]]) .

=

.

array

([1, 1, 2, 2])

2 =

.

array

([2, 2, 1, 1])

return np

.

array

_

equal

(

knnclassifier

(

,

,

, 3),

2)

def knn

_

classifier

_

test

3 ()

=

.

array

([[- 4, - 3, - 2, 2, 3, 4]]) .

=

.

array

([1, 1, 1, 2, 2, 2])

2 =

.

array

([[- 1, 1]]) .

2 =

.

array

([1, 2])

return np

.

array

_

equal

(

knnclassifier

(

,

,

2, 2),

2)

def knn

_

classifier

_

test

4 ()

=

.

array

([[- 4, - 3, - 2, 2, 3, 4]]) .

=

.

array

([1, 1, 1, 2, 2, 2])

2 =

.

array

([[0, 1]]) .

2 =

.

array

([1, 2])

3 =

.

array

([2, 2])

return np

.

array

_

equal

(

knnclassifier

(

,

,

2, 2),

2)

or np

.

array

_

equal

(

knnclassifier

(

,

,

2, 2),

3)

def knn

_

classifier

_

test

5 ()

=

.

random.rand

(4, 4)

=

.

array

([1, 2, 2, 2])

return accuracy

(

knnclassifier

(

,

,

, 1),

) = = 1

def knn

_

classifier

_

test

6 ()

=

.

random.rand

(4, 4)

=

.

array

([1, 2, 1, 2])

return accuracy

(

knnclassifier

(

,

,

, 1),

) = = 1

def knn

_

classifier

_

test

7 ()

=

.

random.rand

(10, 100)

=

.

round

(

.

random.rand

(10)) .

astype

('

int

')

return accuracy

(

knnclassifier

(

,

,

, 1),

) = = 1

runtest

(

knn

_

classifier

_

test

1,'

knn

_

classifier

_

test

1')

runtest

(

knn

_

classifier

_

test

2,'

knn

_

classifier

_

test

2')

runtest

(

knn

_

classifier

_

test

3,'

knn

_

classifier

_

test

3')

runtest

(

knn

_

classifier

_

test

4,'

knn

_

classifier

_

test

4')

runtest

(

knn

_

classifier

_

test

5,'

knn

_

classifier

_

test

5')

runtest

(

knn

_

classifier

_

test

6,'

knn

_

classifier

_

test

6')

runtest

(

knn

_

classifier

_

test

7,'

knn

_

classifier

_

test

7')

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