Subsetting 2-dimensional NumPy Array - Exercises.py

numbers = np.array([
    [40, 55, 66],
    [30, 57, 23],
    [72, 49, 20],
    [20, 111, 203],
    [999, 777, 202]
])

# Repalce the "None" values with your solutions
rows_count, columns_count = None, None
# Get the first element of each row and save it into array with shape (5,). The result should be: [ 40  30  72  20 999]
first_sequence = None
# Get the first element of each row and save it as 2-dimensional array (with shape (5, 1))
second_sequence = None
# Get the second and third elements from the forth and fifth rows
third_sequence = None

# Tests
nose.tools.assert_equal(5, rows_count)
nose.tools.assert_equal(3, columns_count)
nose.tools.assert_sequence_equal([40, 30, 72, 20, 999], first_sequence.tolist())
nose.tools.assert_sequence_equal([[40], [30], [72], [20], [999]], second_sequence.tolist())
nose.tools.assert_sequence_equal([[111, 203], [777, 202]], third_sequence.tolist())

where does the name nose come from sir