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Tuples

In Python, a tuple is an immutable sequence of elements, meaning once you create it, you can't change its contents. Think of it as a setlist for a concert—once it's decided, it stays the same throughout the performance. Here's how you can create a tuple:


python

In this example, track_info is a tuple containing the track name, artist, and release year.

Tuples are perfect for storing related pieces of information that shouldn't change. They're like the essential elements of a song that remain constant, such as the title, artist, and duration. Tuples are also more memory-efficient than lists, making them ideal for storing fixed data.

Accessing elements in a tuple is similar to accessing notes in a melody. You use indexing to get the specific element you need:


              12345678
            
track_info = ("Bohemian Rhapsody", "Queen", 1975)
track_name = track_info[0]
artist = track_info[1]
release_year = track_info[2]

print("Track Name:", track_name)
print("Artist:", artist)
print("Release Year:", release_year)

Tuple unpacking is like breaking down a song into its individual components. You can assign each element of a tuple to a variable in a single line:


              123456
            
track_info = ("Bohemian Rhapsody", "Queen", 1975)
track_name, artist, release_year = track_info

print("Track Name:", track_name)
print("Artist:", artist)
print("Release Year:", release_year)

Tuples are often used to return multiple values from a function. Imagine you're analyzing a track and want to return both its loudness and tempo:


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def analyze_track(track):
    loudness = -5.2  # in dB
    tempo = 120  # in BPM
    return (loudness, tempo)

loudness, tempo = analyze_track("Bohemian Rhapsody")
print("Loudness:", loudness, "dB")
print("Tempo:", tempo, "BPM")

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Complete the get_popularity_range function that calculates and returns a tuple containing the minimum and maximum track popularity from a list of tracks. This is useful for understanding the range of popularity within a dataset.

Inputs:

tracks: A list of dictionaries, where each dictionary represents a track and contains a key 'track_popularity' with an integer value.

Steps:

Initialize Variables:
- Determine the minimum popularity by iterating over the tracks and finding the smallest 'track_popularity' value.
- Determine the maximum popularity by iterating over the tracks and finding the largest 'track_popularity' value.
Return the Tuple:
- Ensure the function returns a tuple where the first element is the minimum popularity and the last element is the maximum popularity. This order is crucial for maintaining consistency and clarity in the data representation.

Løsning

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Sektion 2. Kapitel 4

solution.py

main.py

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Tuples


python

In this example, track_info is a tuple containing the track name, artist, and release year.

Accessing elements in a tuple is similar to accessing notes in a melody. You use indexing to get the specific element you need:


              12345678
            
track_info = ("Bohemian Rhapsody", "Queen", 1975)
track_name = track_info[0]
artist = track_info[1]
release_year = track_info[2]

print("Track Name:", track_name)
print("Artist:", artist)
print("Release Year:", release_year)

Tuple unpacking is like breaking down a song into its individual components. You can assign each element of a tuple to a variable in a single line:


              123456
            
track_info = ("Bohemian Rhapsody", "Queen", 1975)
track_name, artist, release_year = track_info

print("Track Name:", track_name)
print("Artist:", artist)
print("Release Year:", release_year)

Tuples are often used to return multiple values from a function. Imagine you're analyzing a track and want to return both its loudness and tempo:


              12345678
            
def analyze_track(track):
    loudness = -5.2  # in dB
    tempo = 120  # in BPM
    return (loudness, tempo)

loudness, tempo = analyze_track("Bohemian Rhapsody")
print("Loudness:", loudness, "dB")
print("Tempo:", tempo, "BPM")

Opgave

Swipe to start coding

Inputs:

tracks: A list of dictionaries, where each dictionary represents a track and contains a key 'track_popularity' with an integer value.

Steps:

Initialize Variables:
- Determine the minimum popularity by iterating over the tracks and finding the smallest 'track_popularity' value.
- Determine the maximum popularity by iterating over the tracks and finding the largest 'track_popularity' value.
Return the Tuple:
- Ensure the function returns a tuple where the first element is the minimum popularity and the last element is the maximum popularity. This order is crucial for maintaining consistency and clarity in the data representation.

Løsning

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder

Var alt klart?

Tak for dine kommentarer!

Sektion 2. Kapitel 4

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder