Quiz 4.1

price = 49

txt = "The price is {} dollars"

print(txt.format(price))

​

what is output ??

import numpy as np

arr = np.array([1, 2, 3, 4, 5])

print(arr)

• (1 2 3 4 5)

• [1 2 3 4 5]

• 1 2 3 4 5

• {1 2 3 4 5}

import numpy as np

arr = np.array([1, 2, 3, 4, 5])

print(arr)

print(type(arr))

• array

• tuple

• list

• all choices is wrong

import numpy as np

d = np.array([[[1, 2, 3], [4, 5, 6]], [[1, 2, 3], [4, 5, 6]]])

print(d.ndim)

import numpy as np

arr = np.array([[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]])

print(arr[-1, 0, -2])

import numpy as np

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

print(arr[-2, -5] arr[0, 0] arr[1, 1])

import numpy as np

arr = np.array([1, 2, 3, 4, 5, 6, 7])

print(arr[3:5])

• [3 4 5]

• [3:5]

• [4,5]

• all choices is wrong

import numpy as np

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

print(arr[0:1, 1:-2])

• 
  []

• [[2 3],[7 8]]

• [[2 3]]

• all choices is wrong

import numpy as np

arr = np.array([1, 2, 3, 4], dtype='i4')

print(arr)

import numpy as np

arr = np.array([1.1, 2.1, 3.1])

newarr = arr.astype('S')

print(newarr)

print(newarr.dtype)

• [1.1' 2.1' 3.1']

  |S32

• 
  [b'1.1' b'2.1' b'3.1']

  |float64

• [b'1.1' b'2.1' b'3.1'] |S32

• [1.1' 2.1' 3.1']

  |float64