30. What does the following Python code output? import numpy as np a = np.array([[1, 2], [3, 4], [5, 6]]) print(a[:, 1]) [1, 3, 5][1, 4, 5][2, 3, 6][2, 4, 6]
Question
- What does the following Python code output? import numpy as np a = np.array([[1, 2], [3, 4], [5, 6]]) print(a[:, 1]) [1, 3, 5][1, 4, 5][2, 3, 6][2, 4, 6]
Solution
The output of the given Python code will be [2, 4, 6].
Here's the step by step explanation:
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First, the numpy library is imported with the alias np.
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Then, a 2D numpy array 'a' is created with the elements [[1, 2], [3, 4], [5, 6]].
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The print statement is printing a[:, 1]. Here, the colon ':' means all rows and '1' after the comma refers to the second column (since indexing starts from 0 in Python).
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So, it's printing all elements from the second column of the array 'a', which are [2, 4, 6].
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