Pafy – 获取每个播放列表项目的元数据

在本文中，我们将了解如何获取 pafy 中每个播放列表项的元数据。 Pafy 是一个Python库，用于下载 YouTube 内容和检索元数据。 Pafy 对象是包含有关给定视频的所有信息的对象。 YouTube 中的播放列表是一个按顺序播放的视频列表或一组视频，一个视频接一个视频。元数据是“提供有关其他数据的信息的数据”。换句话说，它是“关于数据的数据”。存在许多不同类型的元数据，包括描述性元数据、结构元数据、管理元数据、参考元数据和统计元数据。

我们可以借助get_playlist方法从 youtube 中获取播放列表，下面是执行此操作的命令

pafy.get_playlist(url)

播放列表 url 应该存在于 youtube 上，因为它会获取 youtube 上存在的那些视频的信息。 YouTube 是美国的在线视频分享平台。

Steps to get the playlist ID
1. Import the pafy module
2. Get the playlist with the help of URL of playlist
3. Return play list work as dictionary so use ‘items’ as key with the return playlist
4. Store the result in variable and from the items select the single item
5. With the single item use ‘playlist_meta’ key with it
6. Stor the result in a variable and save it.

编程需要懂一点英语

下面是实现

# importing pafy
import pafy 
    
# url of playlist
url = "https://www.youtube.com / playlist?list = PLqM7alHXFySGqCvcwfqqMrteqWukz9ZoE"
  
# getting playlist
playlist = pafy.get_playlist(url)
  
# getting playlist items
items = playlist["items"]
  
# selecting single item
item = items[1]
  
# getting pafy object
i_pafy = item['pafy']
      
# getting meta data
metadata = item['playlist_meta']
  
# printing meta data
print(metadata)

输出：

{'added': '06/01/2016', 'is_cc': False, 'is_hd': True, 'likes': 1111, 'title': 'Write a program to print all permutations of a given string | GeeksforGeeks', 'views': '334, 905', 'rating': 4.0, 'author': 'GeeksforGeeks', 'user_id': '0RhatS1pyxInC00YKjjBqQ', 'privacy': 'public', 'start': 0.0, 'dislikes': 227, 'duration': '11:52', 'comments': '116', 'keywords': '', 'thumbnail': 'https://i.ytimg.com/vi/AfxHGNRtFac/default.jpg', 'cc_license': False, 'category_id': 22, 'description': 'Explanation for the Article: https://www.geeksforgeeks.org/write-a-c-program-to-print-all-permutations-of-a-given-string/\n\nThis video is contributed by Sephiri.\n#geeksforgeeks', 'encrypted_id': 'AfxHGNRtFac', 'time_created': 1490874673, 'time_updated': None, 'length_seconds': 712, 'end': 712}

另一个例子

# importing pafy
import pafy 
    
# url of playlist
url = "https://www.youtube.com / playlist?list = PLqM7alHXFySE71A2bQdYp37vYr0aReknt"
    
# getting playlist
playlist = pafy.get_playlist(url)
  
# getting playlist items
items = playlist["items"]
  
# selecting single item
item = items[2]
  
# getting meta data
metadata = item['playlist_meta']
  
# printing meta data
print(metadata)

输出：

{'added': '27/09/2017', 'is_cc': True, 'is_hd': True, 'likes': 192, 'title': 'Find subarray with given sum | Set 1 (Non-negative Numbers) | GeeksforGeeks', 'views': '32, 716', 'rating': 3.0, 'author': 'GeeksforGeeks', 'user_id': '0RhatS1pyxInC00YKjjBqQ', 'privacy': 'public', 'start': 0.0, 'dislikes': 78, 'duration': '2:50', 'comments': '24', 'keywords': 'GeeksforGeeks Programming Algorithms "Data Structures" Coding Tutorial array "non-negative numbers"', 'thumbnail': 'https://i.ytimg.com/vi/GY-KULykGaw/default.jpg', 'cc_license': False, 'category_id': 27, 'description': "Find Complete Code at GeeksforGeeks Article: https://www.geeksforgeeks.org/find-subarray-with-given-sum/\n\nPractice Problem Online Judge: http://practice.geeksforgeeks.org/problems/subarray-with-given-sum/0\n\nThis video is contributed by Shubham Kumar\n\nPlease Like, Comment and Share the Video among your friends.\n\nAlso, Subscribe if you haven't already! :)", 'encrypted_id': 'GY-KULykGaw', 'time_created': 1506577926, 'time_updated': None, 'length_seconds': 170, 'end': 170}