Python-创建并实例化类 [英] Python - Create and instantiate class
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问题描述
我正在建立播放列表的 class
,其中将包含许多相同类型的播放列表.
I am building a class
of playlists, which will hold many playlists of the same genre.
class playlist(object):
def __init__(self,name):
self.name = name
我想实例化它们传递给用户:
I would like to instantiate them passing the user:
def hard_rock(self,user):
self.user = user
#query and retrieve data from music API
#return playlist
def pop_rock(self,user):
self.user = user
#query and retrieve data from music API
#return playlist
#and so on
创建实例:
r = playlist('rock')
r.hard_rock('user1')
这是构建和实例化类的逻辑方法吗?
is this a logical way of building and instantiating classes?
推荐答案
如果我理解正确,则需要播放列表和用户
If I understand correctly, you want playlists and users
class Playlist(object):
def __init__(self, name):
self.name = name
self.liked_by = list()
@classmethod
def get_genre(cls, genre):
# this relies on no instance of this class
pass
# return api data...
class User(object):
def __init__(self, name):
self.name = name
def likes_playlist(self, playlist):
playlist.liked_by.append(self.name)
然后是一些例子
playlists = list()
hard_rock = Playlist('hard_rock')
joe = User('joe')
joe.likes_playlist(hard_rock)
playlists.append(hard_rock)
playlists.append(Playlist('pop_rock'))
country = Playlist.get_genre('country')
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