[ 源代码： pafy ]
软件包：python3-pafy（0.5.2-2.1）
Download videos and retrieve metadata from YouTube
Pafy is a Python library for interacting with YouTube from within your Python programs. Its main features include:
* Retrieve metadata such as viewcount, duration, rating, author, thumbnail, keywords * Download video or audio at requested resolution / bitrate / format / filesize * Command line tool (ytdl) for downloading directly from the command line * Retrieve the URL to stream the video in a player such as vlc or mplayer * Works with age-restricted videos and non-embeddable videos * Small, standalone, single importable module file (pafy.py) * Select highest quality stream for download or streaming * Download video only (no audio) in m4v or webm format * Download audio only (no video) in ogg or m4a format * Retrieve playlists and playlist metadata