Python Coding Challange - Question with Answer (01101025)

 

Explanation:

1. Creating the array

a = np.array([[1,2],[3,4]])

a is a 2x2 NumPy array:

[[1, 2],

 [3, 4]]

Shape: (2,2)

2. Flattening the array

b = a.flatten()

.flatten() creates a new 1D array from a.

Important: It does not modify the original array and does not share memory with a.

b now is: [1, 2, 3, 4]

3. Modifying the flattened array

b[0] = 99

Changes the first element of b to 99:

b becomes: [99, 2, 3, 4]

a remains unchanged because flatten() returns a copy, not a view.

4. Printing the original array element

print(a[0,0])

Accesses the element at first row, first column of a.

Since a was not modified, a[0,0] is still 1.

Output:

1

Key Concept :

flatten() creates a copy of the array; ravel() creates a view.

Modifying a copy does not affect the original array.

Use ravel() if you want changes to reflect in the original array.

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