The black formatter is no longer beta (#5960)

* The black formatter is no longer beta

* pre-commit autoupdate

* pre-commit autoupdate

* Remove project_euler/problem_145 which is killing our CI tests

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

machine_learning/k_means_clust.py

@@ -112,7 +112,7 @@ def compute_heterogeneity(data, k, centroids, cluster_assignment):
             distances = pairwise_distances(
                 member_data_points, [centroids[i]], metric="euclidean"
             )
-            squared_distances = distances ** 2
+            squared_distances = distances**2
             heterogeneity += np.sum(squared_distances)
 
     return heterogeneity

machine_learning/local_weighted_learning/local_weighted_learning.py

@@ -25,7 +25,7 @@ def weighted_matrix(point: np.mat, training_data_x: np.mat, bandwidth: float) ->
     # calculating weights for all training examples [x(i)'s]
     for j in range(m):
         diff = point - training_data_x[j]
-        weights[j, j] = np.exp(diff * diff.T / (-2.0 * bandwidth ** 2))
+        weights[j, j] = np.exp(diff * diff.T / (-2.0 * bandwidth**2))
     return weights
 
 

machine_learning/sequential_minimum_optimization.py

@@ -345,15 +345,15 @@ class SmoSVM:
             ol = (
                 l1 * f1
                 + L * f2
-                + 1 / 2 * l1 ** 2 * K(i1, i1)
-                + 1 / 2 * L ** 2 * K(i2, i2)
+                + 1 / 2 * l1**2 * K(i1, i1)
+                + 1 / 2 * L**2 * K(i2, i2)
                 + s * L * l1 * K(i1, i2)
             )
             oh = (
                 h1 * f1
                 + H * f2
-                + 1 / 2 * h1 ** 2 * K(i1, i1)
-                + 1 / 2 * H ** 2 * K(i2, i2)
+                + 1 / 2 * h1**2 * K(i1, i1)
+                + 1 / 2 * H**2 * K(i2, i2)
                 + s * H * h1 * K(i1, i2)
             )
             """