Accessing and Changing Elements, Rows, Columns

curriculum/challenges/english/blocks/numpy/5e9a0a8e09c5df3cc3600ed4.md

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--questions--

What code would change the values in the 3rd column of both of the following Numpy arrays to 20?

a = np.array([[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]])

# Output:
# [[ 1  2  20  4  5]
# [ 6  7 20  9 10]]

python

a[:, 3] = 20

python

a[2, :] = 20

python

a[:, 2] = 20

python

a[1, 2] = 20