Bugfix (possibly?): make spiral data c contiguous

app.py

@@ -97,7 +97,7 @@ def get_spiral(n_clusters):
     y = t * np.sin(t)
     X = np.concatenate((x, y))
     X += 0.7 * np.random.randn(2, N_SAMPLES)
-    X = X.T
+    X = np.ascontiguousarray(X.T)
 
     labels = np.zeros(N_SAMPLES, dtype=int)
     return normalize(X), labels