[Python] get this error when i run the k-means code -> AttributeError: 'NoneType' object has...

from sklearn.cluster import KMeans
cs = []
for i in range(1, 11):
kmeans = KMeans(n_clusters = i, init = 'k-means++', max_iter = 300, n_init = 10, random_state = 0)
kmeans.fit(X)
cs.append(kmeans.inertia_)
plt.plot(range(1, 11), cs)
plt.title('The Elbow Method')
plt.xlabel('Number of clusters')
plt.ylabel('CS')
plt.show()


when I run this code, I have the following error:

AttributeError: 'NoneType' object has no attribute 'split'
​

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