WAV audio file handling in SciPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read a WAV file using scipy.

SciPy

from scipy.io import wavfile
sample_rate, data = wavfile.[1]('audio.wav')

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

Aread

Bload

Cwrite

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using wavfile.write instead of wavfile.read

Trying to use wavfile.load which does not exist

The wavfile.read function reads a WAV file and returns the sample rate and data array.

2fill in blank

medium

Complete the code to write data to a WAV file using scipy.

SciPy

from scipy.io import wavfile
wavfile.[1]('output.wav', sample_rate, data)

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Awrite

Bread

Csave

Dexport

Attempts:

3 left

💡 Hint

Common Mistakes

Using wavfile.read instead of wavfile.write

Trying to use wavfile.save which does not exist

The wavfile.write function saves audio data to a WAV file with a given sample rate.

3fill in blank

hard

Fix the error in the code to correctly read a WAV file and print its sample rate.

SciPy

from scipy.io import wavfile
sample_rate, data = wavfile.read('sound.wav')
print([1])

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Adata

Bsample_rate

Cwavfile

Dsound.wav

Attempts:

3 left

💡 Hint

Common Mistakes

Printing the data array instead of sample rate

Printing the filename string instead of a variable

To print the sample rate, use the variable sample_rate which stores it after reading the file.

4fill in blank

hard

Fill both blanks to create a dictionary with word lengths for words longer than 3 letters.

SciPy

words = ['sound', 'wav', 'file', 'data', 'io']
lengths = {word: [1] for word in words if len(word) [2] 3}

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Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself instead of its length

Using less than < instead of greater than >

This dictionary comprehension stores the length of each word only if the word length is greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values filtered by positive numbers.

SciPy

data = {'a': 1, 'b': -2, 'c': 3}
result = { [1]: [2] for k, v in data.items() if v [3] 0 }

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Ak.upper()

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using original keys instead of uppercase

Including negative values by mistake

This dictionary comprehension creates keys as uppercase letters and includes only items with positive values.