Issue defining KneighborsClassifier in Jupyter Notebooks

Question

I am attempting to utilize KNN on the Iris data set as a "Hello World" of Machine Learning. I am using a Jupyter Notebook from Anaconda and have been clearly documenting each step. A "NameError: name 'knn' is not defined" exception is currently being thrown when I attempt to use knn.fit(X,Y) What am I missing here? I attempted to test the definition of knn by calling print(knn) and I get the following output:

KNeighborsClassifier(algorithm='auto', leaf_size=30, metric='minkowski',
           metric_params=None, n_jobs=1, n_neighbors=1, p=2,
           weights='uniform')

Code below:

#import the load_iris dataset
from sklearn.datasets import load_iris
#save "bunch" object containing iris dataset and its attributes
iris = load_iris()
X = iris.data
Y = iris.target

#import class you plan to use
from sklearn.neighbors import KNeighborsClassifier
knn = KNeighborsClassifier(n_neighbors = 1)

#Fit the model with data (aka "model training")
knn.fit(X,Y)

Solution

Had same issue. running the following worked for me:

model = sklearn.neighbors.KNeighborsClassifier(n_neighbors=5) 

ran in:

Python 3.6.9

Comments

[Mohammad Athar]

what version of python and sklearn are you using?

[Mohammad Athar]

this works fine for me, can you try restarting jupyter?

[MaxPowers]

Please consider posting a minimal, complete and verifyable example of your problem. Lines 6 to 29 are unnecessary for your question. Besides that, your code runs flawlessly on my maschine (Python 3.6)

[StormsEdge]

I am running Python 3.6.3. It is potentially an issue with my Jupyter Notebook? I have tried restarting the notebook several times and it does not remedy the issue. I initially had an issue with creating a new notebook, but once i moved into the anaconda projects file i had no issue creating a new notebook.

[MaxPowers]

Could you please include the Error Message in your question?

[StormsEdge]

it's a NameError, which is listed above. "name 'knn' is not defined." I will add that more clearly to the above

[MaxPowers]

Did you execute the code exactly the same way you've posted it here? If not, please copy the listing form above and execute it in a single cell.

[StormsEdge]

@MaxPowers That is copy and pasted aside from the edits you've made

[StormsEdge]

@MaxPowers This is also code that runs in a Jupyter notebook as also mentioned.

[MaxPowers]

Let us continue this discussion in chat.

[Mighty Diffy]

or just: from sklearn.neighbors import KNeighborsClassifier