np.save() and np.load() for binary in NumPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to save the numpy array to a binary file.

NumPy

import numpy as np
arr = np.array([1, 2, 3, 4])
np.save('data.npy', [1])

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

Aarray

Bnp.array

Cdata

Darr

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the function np.array instead of the array variable.

Using a variable name that does not exist.

The np.save() function saves the numpy array to a binary file. You need to pass the array variable arr as the second argument.

2fill in blank

medium

Complete the code to load the numpy array from the binary file.

NumPy

import numpy as np
loaded_arr = np.load([1])
print(loaded_arr)

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

A'data.npy'

Bdata.npy

C'arr.npy'

Darr.npy

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the filename.

Using the wrong filename.

The np.load() function loads the numpy array from the binary file. The filename must be a string, so it needs quotes.

3fill in blank

hard

Fix the error in the code to correctly save the array in binary format.

NumPy

import numpy as np
arr = np.array([5, 6, 7])
np.save('my_array.npy', [1])

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

Aarr.copy

Barr

Carr.tolist

Darr.mean

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses after the array variable.

Passing a method instead of the array.

You should pass the array variable arr directly to np.save(). Calling arr() or other methods is incorrect.

4fill in blank

hard

Fill both blanks to save and then load the array correctly.

NumPy

import numpy as np
arr = np.array([10, 20, 30])
np.save([1], [2])
loaded = np.load('numbers.npy')
print(loaded)

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

A'numbers.npy'

Barr

C'arr.npy'

Dnumbers

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different filename in np.save() than in np.load().

Passing a string instead of the array variable as the second argument.

Use the filename 'numbers.npy' as the first argument and the array variable arr as the second argument to np.save().

5fill in blank

hard

Fill all three blanks to save an array, load it, and print the first element.

NumPy

import numpy as np
arr = np.array([100, 200, 300])
np.save([1], [2])
loaded_arr = np.load([3])
print(loaded_arr[0])

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

A'values.npy'

Barr

D'data.npy'

Attempts:

3 left

💡 Hint

Common Mistakes

Using different filenames for saving and loading.

Passing a string instead of the array variable when saving.

Save the array arr to 'values.npy', then load from the same file, and print the first element.