UP my solution

Author: RasulAlakbarli

numpy_questions.py

@@ -37,16 +37,15 @@ def max_index(X):
         If the input is not a numpy array or
         if the shape is not 2D.
     """
-    
     if not isinstance(X, np.ndarray):
         raise ValueError("Input must be a numpy array.")
-    
+
     if X.ndim != 2:
         raise ValueError("Input must be a 2D numpy array.")
-    
+
     if X.size == 0:
         raise ValueError("Input array must not be empty.")
-    
+
     i, j = np.unravel_index(np.argmax(X), X.shape)
     return i, j
 
@@ -71,4 +70,4 @@ def wallis_product(n_terms):
     pi = 1
     for i in range(1, n_terms + 1):
         pi *= (4 * i ** 2) / (4 * i ** 2 - 1)
-    return 2 * pi
+    return 2 * pi