Introduction

Pafy is a Python library that provides a simple and convenient way to retrieve video information, extract streams, and download media from various online platforms such as YouTube, Vimeo, Dailymotion, and more. With Pafy, you can easily extract metadata like title, duration, views, likes, dislikes, and even download media files in different formats and qualities.

This tutorial will guide you on how to use Pafy to fetch keywords or relevant information for each item in a playlist. Markdown format will be used to present the code snippets and explanations in an organized manner.

Installation

To get started with Pafy, you need to install the library using pip. Open your preferred command-line interface and execute the following command:

pip install pafy

Make sure you have a stable internet connection during the installation process.

Retrieving Keywords for Each Playlist Item

Now let's dive into the code and understand how to retrieve keywords for each item in a playlist using Pafy.

import pafy

# Step 1: Create a playlist object
playlist_url = "https://www.youtube.com/playlist?list=PLQVvvaa0QuDhiRAr3jLKYysx_QQOGCpP7k"
playlist = pafy.get_playlist(playlist_url)

# Step 2: Retrieve keywords for each item
all_keywords = []
for video in playlist['items']:
    video_url = "https://www.youtube.com/watch?v=" + video['playlist_meta']['encrypted_id']
    pafy_video = pafy.new(video_url)
    keywords = pafy_video.keywords
    all_keywords.append(keywords)

# Step 3: Print the keywords
for i, keywords in enumerate(all_keywords):
    print(f"Keywords for video #{i+1}: {keywords}")

Let's break down the code to understand how it works:

1. Firstly, we import the pafy module, which enables us to work with Pafy functionality.
2. We create a playlist object by providing the URL of the desired playlist using pafy.get_playlist(). Replace playlist_url with your preferred playlist URL.
3. Now, by iterating over the items in the playlist, we retrieve the video URL for each item using video['playlist_meta']['encrypted_id'].
4. With the video URL, we create a new pafy object by calling pafy.new(video_url). This object allows us to extract various information about the video, including the keywords.
5. We store the keywords in the all_keywords list for each video.
6. Finally, we print the keywords for each video using a simple loop.

This code snippet demonstrates how you can use Pafy to retrieve keywords for each item in a playlist. Feel free to modify the code to suit your specific requirements.

Remember to provide the appropriate URL for the playlist in the playlist_url variable in order to get the desired results.

Happy coding with Pafy!