Specifying dtype during creation in NumPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a NumPy array of integers.

NumPy

import numpy as np
arr = np.array([1, 2, 3], dtype=[1])

Drag options to blanks, or click blank then click option'

Aint

Bbool

Cstr

Dfloat

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'float' instead of 'int' changes the array to decimals.

Using 'str' creates an array of strings, not numbers.

Using dtype='int' creates an integer array.

2fill in blank

medium

Complete the code to create a NumPy array of floats.

NumPy

import numpy as np
arr = np.array([1, 2, 3], dtype=[1])

Drag options to blanks, or click blank then click option'

Aint

Bbool

Cfloat

Dcomplex

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'int' results in whole numbers only.

Using 'bool' creates True/False values, not numbers.

Using dtype='float' creates an array with decimal numbers.

3fill in blank

hard

Fix the error in the code to create a NumPy array of booleans.

NumPy

import numpy as np
arr = np.array([0, 1, 2], dtype=[1])

Drag options to blanks, or click blank then click option'

Astr

Bfloat

Cint

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'int' keeps the numbers as integers.

Using 'str' converts numbers to strings.

Using dtype='bool' converts numbers to True/False values.

4fill in blank

hard

Fill both blanks to create a NumPy array of complex numbers.

NumPy

import numpy as np
arr = np.array([1, 2, 3], dtype=[1])
print(arr[2])

Drag options to blanks, or click blank then click option'

Acomplex

Bint

C.dtype

D.shape

Attempts:

3 left

💡 Hint

Common Mistakes

Using '.shape' instead of '.dtype' prints the array shape, not type.

Using 'int' does not create complex numbers.

Use dtype='complex' to create complex numbers.
Use .dtype to print the data type of the array.

5fill in blank

hard

Fill all three blanks to create a NumPy array of strings and print its shape.

NumPy

import numpy as np
arr = np.array(["a", "b", "c"], dtype=[1])
print(arr[2])
print(arr[3])

Drag options to blanks, or click blank then click option'

Astr

B.dtype

C.shape

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'int' as dtype creates integer array, not strings.

Mixing up '.dtype' and '.shape' attributes.

Use dtype='str' to create an array of strings.
Use .dtype to print the data type.
Use .shape to print the array shape.