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pylast.py
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pylast.py
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# -*- coding: utf-8 -*-
#
# pylast - A Python interface to Last.fm (and other API compatible social networks)
# Copyright (C) 2008-2009 Amr Hassan
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
#
# http://code.google.com/p/pylast/
__version__ = '0.4'
__author__ = 'Amr Hassan'
__copyright__ = "Copyright (C) 2008-2009 Amr Hassan"
__license__ = "gpl"
__email__ = '[email protected]'
import hashlib
import httplib
import urllib
import threading
from xml.dom import minidom
import xml.dom
import time
import shelve
import tempfile
import sys
import htmlentitydefs
try:
import collections
except ImportError:
pass
STATUS_INVALID_SERVICE = 2
STATUS_INVALID_METHOD = 3
STATUS_AUTH_FAILED = 4
STATUS_INVALID_FORMAT = 5
STATUS_INVALID_PARAMS = 6
STATUS_INVALID_RESOURCE = 7
STATUS_TOKEN_ERROR = 8
STATUS_INVALID_SK = 9
STATUS_INVALID_API_KEY = 10
STATUS_OFFLINE = 11
STATUS_SUBSCRIBERS_ONLY = 12
STATUS_INVALID_SIGNATURE = 13
STATUS_TOKEN_UNAUTHORIZED = 14
STATUS_TOKEN_EXPIRED = 15
EVENT_ATTENDING = '0'
EVENT_MAYBE_ATTENDING = '1'
EVENT_NOT_ATTENDING = '2'
PERIOD_OVERALL = 'overall'
PERIOD_3MONTHS = '3month'
PERIOD_6MONTHS = '6month'
PERIOD_12MONTHS = '12month'
DOMAIN_ENGLISH = 0
DOMAIN_GERMAN = 1
DOMAIN_SPANISH = 2
DOMAIN_FRENCH = 3
DOMAIN_ITALIAN = 4
DOMAIN_POLISH = 5
DOMAIN_PORTUGUESE = 6
DOMAIN_SWEDISH = 7
DOMAIN_TURKISH = 8
DOMAIN_RUSSIAN = 9
DOMAIN_JAPANESE = 10
DOMAIN_CHINESE = 11
COVER_SMALL = 0
COVER_MEDIUM = 1
COVER_LARGE = 2
COVER_EXTRA_LARGE = 3
COVER_MEGA = 4
IMAGES_ORDER_POPULARITY = "popularity"
IMAGES_ORDER_DATE = "dateadded"
USER_MALE = 'Male'
USER_FEMALE = 'Female'
SCROBBLE_SOURCE_USER = "P"
SCROBBLE_SOURCE_NON_PERSONALIZED_BROADCAST = "R"
SCROBBLE_SOURCE_PERSONALIZED_BROADCAST = "E"
SCROBBLE_SOURCE_LASTFM = "L"
SCROBBLE_SOURCE_UNKNOWN = "U"
SCROBBLE_MODE_PLAYED = ""
SCROBBLE_MODE_LOVED = "L"
SCROBBLE_MODE_BANNED = "B"
SCROBBLE_MODE_SKIPPED = "S"
"""
A list of the implemented webservices (from http://www.last.fm/api/intro)
=====================================
# Album
* album.addTags DONE
* album.getInfo DONE
* album.getTags DONE
* album.removeTag DONE
* album.search DONE
# Artist
* artist.addTags DONE
* artist.getEvents DONE
* artist.getImages DONE
* artist.getInfo DONE
* artist.getPodcast TODO
* artist.getShouts DONE
* artist.getSimilar DONE
* artist.getTags DONE
* artist.getTopAlbums DONE
* artist.getTopFans DONE
* artist.getTopTags DONE
* artist.getTopTracks DONE
* artist.removeTag DONE
* artist.search DONE
* artist.share DONE
* artist.shout DONE
# Auth
* auth.getMobileSession DONE
* auth.getSession DONE
* auth.getToken DONE
# Event
* event.attend DONE
* event.getAttendees DONE
* event.getInfo DONE
* event.getShouts DONE
* event.share DONE
* event.shout DONE
# Geo
* geo.getEvents
* geo.getTopArtists
* geo.getTopTracks
# Group
* group.getMembers DONE
* group.getWeeklyAlbumChart DONE
* group.getWeeklyArtistChart DONE
* group.getWeeklyChartList DONE
* group.getWeeklyTrackChart DONE
# Library
* library.addAlbum DONE
* library.addArtist DONE
* library.addTrack DONE
* library.getAlbums DONE
* library.getArtists DONE
* library.getTracks DONE
# Playlist
* playlist.addTrack DONE
* playlist.create DONE
* playlist.fetch DONE
# Radio
* radio.getPlaylist
* radio.tune
# Tag
* tag.getSimilar DONE
* tag.getTopAlbums DONE
* tag.getTopArtists DONE
* tag.getTopTags DONE
* tag.getTopTracks DONE
* tag.getWeeklyArtistChart DONE
* tag.getWeeklyChartList DONE
* tag.search DONE
# Tasteometer
* tasteometer.compare DONE
# Track
* track.addTags DONE
* track.ban DONE
* track.getInfo DONE
* track.getSimilar DONE
* track.getTags DONE
* track.getTopFans DONE
* track.getTopTags DONE
* track.love DONE
* track.removeTag DONE
* track.search DONE
* track.share DONE
# User
* user.getEvents DONE
* user.getFriends DONE
* user.getInfo DONE
* user.getLovedTracks DONE
* user.getNeighbours DONE
* user.getPastEvents DONE
* user.getPlaylists DONE
* user.getRecentStations TODO
* user.getRecentTracks DONE
* user.getRecommendedArtists DONE
* user.getRecommendedEvents DONE
* user.getShouts DONE
* user.getTopAlbums DONE
* user.getTopArtists DONE
* user.getTopTags DONE
* user.getTopTracks DONE
* user.getWeeklyAlbumChart DONE
* user.getWeeklyArtistChart DONE
* user.getWeeklyChartList DONE
* user.getWeeklyTrackChart DONE
* user.shout DONE
# Venue
* venue.getEvents DONE
* venue.getPastEvents DONE
* venue.search DONE
"""
class Network(object):
"""
A music social network website that is Last.fm or one exposing a Last.fm compatible API
"""
def __init__(self, name, homepage, ws_server, api_key, api_secret, session_key, submission_server, username, password_hash,
domain_names, urls):
"""
name: the name of the network
homepage: the homepage url
ws_server: the url of the webservices server
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
submission_server: the url of the server to which tracks are submitted (scrobbled)
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password thingy
domain_names: a dict mapping each DOMAIN_* value to a string domain name
urls: a dict mapping types to urls
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
Either a valid session_key or a combination of username and password_hash must be present for scrobbling.
You should use a preconfigured network object through a get_*_network(...) method instead of creating an object
of this class, unless you know what you're doing.
"""
self.ws_server = ws_server
self.submission_server = submission_server
self.name = name
self.homepage = homepage
self.api_key = api_key
self.api_secret = api_secret
self.session_key = session_key
self.username = username
self.password_hash = password_hash
self.domain_names = domain_names
self.urls = urls
self.cache_backend = None
self.proxy_enabled = False
self.proxy = None
self.last_call_time = 0
#generate a session_key if necessary
if (self.api_key and self.api_secret) and not self.session_key and (self.username and self.password_hash):
sk_gen = SessionKeyGenerator(self)
self.session_key = sk_gen.get_session_key(self.username, self.password_hash)
def get_artist(self, artist_name):
"""
Return an Artist object
"""
return Artist(artist_name, self)
def get_track(self, artist, title):
"""
Return a Track object
"""
return Track(artist, title, self)
def get_album(self, artist, title):
"""
Return an Album object
"""
return Album(artist, title, self)
def get_authenticated_user(self):
"""
Returns the authenticated user
"""
return AuthenticatedUser(self)
def get_country(self, country_name):
"""
Returns a country object
"""
return Country(country_name, self)
def get_group(self, name):
"""
Returns a Group object
"""
return Group(name, self)
def get_user(self, username):
"""
Returns a user object
"""
return User(username, self)
def get_tag(self, name):
"""
Returns a tag object
"""
return Tag(name, self)
def get_scrobbler(self, client_id, client_version):
"""
Returns a Scrobbler object used for submitting tracks to the server
Quote from http://www.last.fm/api/submissions:
========
Client identifiers are used to provide a centrally managed database of
the client versions, allowing clients to be banned if they are found to
be behaving undesirably. The client ID is associated with a version
number on the server, however these are only incremented if a client is
banned and do not have to reflect the version of the actual client application.
During development, clients which have not been allocated an identifier should
use the identifier tst, with a version number of 1.0. Do not distribute code or
client implementations which use this test identifier. Do not use the identifiers
used by other clients.
=========
To obtain a new client identifier please contact:
* Last.fm: [email protected]
* # TODO: list others
...and provide us with the name of your client and its homepage address.
"""
return Scrobbler(self, client_id, client_version)
def _get_language_domain(self, domain_language):
"""
Returns the mapped domain name of the network to a DOMAIN_* value
"""
if domain_language in self.domain_names:
return self.domain_names[domain_language]
def _get_url(self, domain, type):
return "http://%s/%s" %(self._get_language_domain(domain), self.urls[type])
def _get_ws_auth(self):
"""
Returns a (API_KEY, API_SECRET, SESSION_KEY) tuple.
"""
return (self.api_key, self.api_secret, self.session_key)
def _delay_call(self):
"""
Makes sure that web service calls are at least a second apart
"""
# delay time in seconds
DELAY_TIME = 1.0
now = time.time()
if (now - self.last_call_time) < DELAY_TIME:
time.sleep(1)
self.last_call_time = now
def create_new_playlist(self, title, description):
"""
Creates a playlist for the authenticated user and returns it
title: The title of the new playlist.
description: The description of the new playlist.
"""
params = {}
params['title'] = _unicode(title)
params['description'] = _unicode(description)
doc = _Request(self, 'playlist.create', params).execute(False)
e_id = doc.getElementsByTagName("id")[0].firstChild.data
user = doc.getElementsByTagName('playlists')[0].getAttribute('user')
return Playlist(user, e_id, self)
def get_top_tags(self, limit=None):
"""Returns a sequence of the most used tags as a sequence of TopItem objects."""
doc = _Request(self, "tag.getTopTags").execute(True)
seq = []
for node in doc.getElementsByTagName("tag"):
tag = Tag(_extract(node, "name"), self)
weight = _number(_extract(node, "count"))
if len(seq) < limit:
seq.append(TopItem(tag, weight))
return seq
def enable_proxy(self, host, port):
"""Enable a default web proxy"""
self.proxy = [host, _number(port)]
self.proxy_enabled = True
def disable_proxy(self):
"""Disable using the web proxy"""
self.proxy_enabled = False
def is_proxy_enabled(self):
"""Returns True if a web proxy is enabled."""
return self.proxy_enabled
def _get_proxy(self):
"""Returns proxy details."""
return self.proxy
def enable_caching(self, file_path = None):
"""Enables caching request-wide for all cachable calls.
In choosing the backend used for caching, it will try _SqliteCacheBackend first if
the module sqlite3 is present. If not, it will fallback to _ShelfCacheBackend which uses shelve.Shelf objects.
* file_path: A file path for the backend storage file. If
None set, a temp file would probably be created, according the backend.
"""
if not file_path:
file_path = tempfile.mktemp(prefix="pylast_tmp_")
self.cache_backend = _ShelfCacheBackend(file_path)
def disable_caching(self):
"""Disables all caching features."""
self.cache_backend = None
def is_caching_enabled(self):
"""Returns True if caching is enabled."""
return not (self.cache_backend == None)
def _get_cache_backend(self):
return self.cache_backend
def search_for_album(self, album_name):
"""Searches for an album by its name. Returns a AlbumSearch object.
Use get_next_page() to retreive sequences of results."""
return AlbumSearch(album_name, self)
def search_for_artist(self, artist_name):
"""Searches of an artist by its name. Returns a ArtistSearch object.
Use get_next_page() to retreive sequences of results."""
return ArtistSearch(artist_name, self)
def search_for_tag(self, tag_name):
"""Searches of a tag by its name. Returns a TagSearch object.
Use get_next_page() to retreive sequences of results."""
return TagSearch(tag_name, self)
def search_for_track(self, artist_name, track_name):
"""Searches of a track by its name and its artist. Set artist to an empty string if not available.
Returns a TrackSearch object.
Use get_next_page() to retreive sequences of results."""
return TrackSearch(artist_name, track_name, self)
def search_for_venue(self, venue_name, country_name):
"""Searches of a venue by its name and its country. Set country_name to an empty string if not available.
Returns a VenueSearch object.
Use get_next_page() to retreive sequences of results."""
return VenueSearch(venue_name, country_name, self)
def get_track_by_mbid(self, mbid):
"""Looks up a track by its MusicBrainz ID"""
params = {"mbid": _unicode(mbid)}
doc = _Request(self, "track.getInfo", params).execute(True)
return Track(_extract(doc, "name", 1), _extract(doc, "name"), self)
def get_artist_by_mbid(self, mbid):
"""Loooks up an artist by its MusicBrainz ID"""
params = {"mbid": _unicode(mbid)}
doc = _Request(self, "artist.getInfo", params).execute(True)
return Artist(_extract(doc, "name"), self)
def get_album_by_mbid(self, mbid):
"""Looks up an album by its MusicBrainz ID"""
params = {"mbid": _unicode(mbid)}
doc = _Request(self, "album.getInfo", params).execute(True)
return Album(_extract(doc, "artist"), _extract(doc, "name"), self)
def get_lastfm_network(api_key="", api_secret="", session_key = "", username = "", password_hash = ""):
"""
Returns a preconfigured Network object for Last.fm
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
Either a valid session_key or a combination of username and password_hash must be present for scrobbling.
Most read-only webservices only require an api_key and an api_secret, see about obtaining them from:
http://www.last.fm/api/account
"""
return Network (
name = "Last.fm",
homepage = "http://last.fm",
ws_server = ("ws.audioscrobbler.com", "/2.0/"),
api_key = api_key,
api_secret = api_secret,
session_key = session_key,
submission_server = "http://post.audioscrobbler.com:80/",
username = username,
password_hash = password_hash,
domain_names = {
DOMAIN_ENGLISH: 'www.last.fm',
DOMAIN_GERMAN: 'www.lastfm.de',
DOMAIN_SPANISH: 'www.lastfm.es',
DOMAIN_FRENCH: 'www.lastfm.fr',
DOMAIN_ITALIAN: 'www.lastfm.it',
DOMAIN_POLISH: 'www.lastfm.pl',
DOMAIN_PORTUGUESE: 'www.lastfm.com.br',
DOMAIN_SWEDISH: 'www.lastfm.se',
DOMAIN_TURKISH: 'www.lastfm.com.tr',
DOMAIN_RUSSIAN: 'www.lastfm.ru',
DOMAIN_JAPANESE: 'www.lastfm.jp',
DOMAIN_CHINESE: 'cn.last.fm',
},
urls = {
"album": "music/%(artist)s/%(album)s",
"artist": "music/%(artist)s",
"event": "event/%(id)s",
"country": "place/%(country_name)s",
"playlist": "user/%(user)s/library/playlists/%(appendix)s",
"tag": "tag/%(name)s",
"track": "music/%(artist)s/_/%(title)s",
"group": "group/%(name)s",
"user": "user/%(name)s",
}
)
def get_librefm_network(api_key="", api_secret="", session_key = "", username = "", password_hash = ""):
"""
Returns a preconfigured Network object for Libre.fm
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
"""
return Network (
name = "Libre.fm",
homepage = "http://alpha.dev.libre.fm",
ws_server = ("alpha.dev.libre.fm", "/2.0/"),
api_key = api_key,
api_secret = api_secret,
session_key = session_key,
submission_server = "http://turtle.libre.fm:80/",
username = username,
password_hash = password_hash,
domain_names = {
DOMAIN_ENGLISH: "alpha.dev.libre.fm",
DOMAIN_GERMAN: "alpha.dev.libre.fm",
DOMAIN_SPANISH: "alpha.dev.libre.fm",
DOMAIN_FRENCH: "alpha.dev.libre.fm",
DOMAIN_ITALIAN: "alpha.dev.libre.fm",
DOMAIN_POLISH: "alpha.dev.libre.fm",
DOMAIN_PORTUGUESE: "alpha.dev.libre.fm",
DOMAIN_SWEDISH: "alpha.dev.libre.fm",
DOMAIN_TURKISH: "alpha.dev.libre.fm",
DOMAIN_RUSSIAN: "alpha.dev.libre.fm",
DOMAIN_JAPANESE: "alpha.dev.libre.fm",
DOMAIN_CHINESE: "alpha.dev.libre.fm",
},
urls = {
"album": "artist/%(artist)s/album/%(album)s",
"artist": "artist/%(artist)s",
"event": "event/%(id)s",
"country": "place/%(country_name)s",
"playlist": "user/%(user)s/library/playlists/%(appendix)s",
"tag": "tag/%(name)s",
"track": "music/%(artist)s/_/%(title)s",
"group": "group/%(name)s",
"user": "user/%(name)s",
}
)
class _ShelfCacheBackend(object):
"""Used as a backend for caching cacheable requests."""
def __init__(self, file_path = None):
self.shelf = shelve.open(file_path)
def get_xml(self, key):
return self.shelf[key]
def set_xml(self, key, xml_string):
self.shelf[key] = xml_string
def has_key(self, key):
return key in self.shelf.keys()
class _ThreadedCall(threading.Thread):
"""Facilitates calling a function on another thread."""
def __init__(self, sender, funct, funct_args, callback, callback_args):
threading.Thread.__init__(self)
self.funct = funct
self.funct_args = funct_args
self.callback = callback
self.callback_args = callback_args
self.sender = sender
def run(self):
output = []
if self.funct:
if self.funct_args:
output = self.funct(*self.funct_args)
else:
output = self.funct()
if self.callback:
if self.callback_args:
self.callback(self.sender, output, *self.callback_args)
else:
self.callback(self.sender, output)
class _Request(object):
"""Representing an abstract web service operation."""
def __init__(self, network, method_name, params = {}):
self.params = params
self.network = network
(self.api_key, self.api_secret, self.session_key) = network._get_ws_auth()
self.params["api_key"] = self.api_key
self.params["method"] = method_name
if network.is_caching_enabled():
self.cache = network._get_cache_backend()
if self.session_key:
self.params["sk"] = self.session_key
self.sign_it()
def sign_it(self):
"""Sign this request."""
if not "api_sig" in self.params.keys():
self.params['api_sig'] = self._get_signature()
def _get_signature(self):
"""Returns a 32-character hexadecimal md5 hash of the signature string."""
keys = self.params.keys()[:]
keys.sort()
string = ""
for name in keys:
string += name
string += self.params[name]
string += self.api_secret
return md5(string)
def _get_cache_key(self):
"""The cache key is a string of concatenated sorted names and values."""
keys = self.params.keys()
keys.sort()
cache_key = str()
for key in keys:
if key != "api_sig" and key != "api_key" and key != "sk":
cache_key += key + _string(self.params[key])
return hashlib.sha1(cache_key).hexdigest()
def _get_cached_response(self):
"""Returns a file object of the cached response."""
if not self._is_cached():
response = self._download_response()
self.cache.set_xml(self._get_cache_key(), response)
return self.cache.get_xml(self._get_cache_key())
def _is_cached(self):
"""Returns True if the request is already in cache."""
return self.cache.has_key(self._get_cache_key())
def _download_response(self):
"""Returns a response body string from the server."""
# Delay the call if necessary
#self.network._delay_call() # enable it if you want.
data = []
for name in self.params.keys():
data.append('='.join((name, urllib.quote_plus(_string(self.params[name])))))
data = '&'.join(data)
headers = {
"Content-type": "application/x-www-form-urlencoded",
'Accept-Charset': 'utf-8',
'User-Agent': "pylast" + '/' + __version__
}
(HOST_NAME, HOST_SUBDIR) = self.network.ws_server
if self.network.is_proxy_enabled():
conn = httplib.HTTPConnection(host = self._get_proxy()[0], port = self._get_proxy()[1])
conn.request(method='POST', url="http://" + HOST_NAME + HOST_SUBDIR,
body=data, headers=headers)
else:
conn = httplib.HTTPConnection(host=HOST_NAME)
conn.request(method='POST', url=HOST_SUBDIR, body=data, headers=headers)
response = conn.getresponse()
response_text = _unicode(response.read())
self._check_response_for_errors(response_text)
return response_text
def execute(self, cacheable = False):
"""Returns the XML DOM response of the POST Request from the server"""
if self.network.is_caching_enabled() and cacheable:
response = self._get_cached_response()
else:
response = self._download_response()
return minidom.parseString(_string(response))
def _check_response_for_errors(self, response):
"""Checks the response for errors and raises one if any exists."""
doc = minidom.parseString(_string(response))
e = doc.getElementsByTagName('lfm')[0]
if e.getAttribute('status') != "ok":
e = doc.getElementsByTagName('error')[0]
status = e.getAttribute('code')
details = e.firstChild.data.strip()
raise WSError(self.network, status, details)
class SessionKeyGenerator(object):
"""Methods of generating a session key:
1) Web Authentication:
a. network = get_*_network(API_KEY, API_SECRET)
b. sg = SessionKeyGenerator(network)
c. url = sg.get_web_auth_url()
d. Ask the user to open the url and authorize you, and wait for it.
e. session_key = sg.get_web_auth_session_key(url)
2) Username and Password Authentication:
a. network = get_*_network(API_KEY, API_SECRET)
b. username = raw_input("Please enter your username: ")
c. password_hash = pylast.md5(raw_input("Please enter your password: ")
d. session_key = SessionKeyGenerator(network).get_session_key(username, password_hash)
A session key's lifetime is infinie, unless the user provokes the rights of the given API Key.
If you create a Network object with just a API_KEY and API_SECRET and a username and a password_hash, a
SESSION_KEY will be automatically generated for that network and stored in it so you don't have to do this
manually, unless you want to.
"""
def __init__(self, network):
self.network = network
self.web_auth_tokens = {}
def _get_web_auth_token(self):
"""Retrieves a token from the network for web authentication.
The token then has to be authorized from getAuthURL before creating session.
"""
request = _Request(self.network, 'auth.getToken')
# default action is that a request is signed only when
# a session key is provided.
request.sign_it()
doc = request.execute()
e = doc.getElementsByTagName('token')[0]
return e.firstChild.data
def get_web_auth_url(self):
"""The user must open this page, and you first, then call get_web_auth_session_key(url) after that."""
token = self._get_web_auth_token()
url = '%(homepage)s/api/auth/?api_key=%(api)s&token=%(token)s' % \
{"homepage": self.network.homepage, "api": self.network.api_key, "token": token}
self.web_auth_tokens[url] = token
return url
def get_web_auth_session_key(self, url):
"""Retrieves the session key of a web authorization process by its url."""
if url in self.web_auth_tokens.keys():
token = self.web_auth_tokens[url]
else:
token = "" #that's gonna raise a WSError of an unauthorized token when the request is executed.
request = _Request(self.network, 'auth.getSession', {'token': token})
# default action is that a request is signed only when
# a session key is provided.
request.sign_it()
doc = request.execute()
return doc.getElementsByTagName('key')[0].firstChild.data
def get_session_key(self, username, password_hash):
"""Retrieve a session key with a username and a md5 hash of the user's password."""
params = {"username": username, "authToken": md5(username + password_hash)}
request = _Request(self.network, "auth.getMobileSession", params)
# default action is that a request is signed only when
# a session key is provided.
request.sign_it()
doc = request.execute()
return _extract(doc, "key")
def _namedtuple(name, children):
"""
collections.namedtuple is available in (python >= 2.6)
"""
v = sys.version_info
if v[1] >= 6 and v[0] < 3:
return collections.namedtuple(name, children)
else:
def fancydict(*args):
d = {}
i = 0
for child in children:
d[child.strip()] = args[i]
i += 1
return d
return fancydict
TopItem = _namedtuple("TopItem", ["item", "weight"])
SimilarItem = _namedtuple("SimilarItem", ["item", "match"])
LibraryItem = _namedtuple("LibraryItem", ["item", "playcount", "tagcount"])
PlayedTrack = _namedtuple("PlayedTrack", ["track", "playback_date", "timestamp"])
ImageSizes = _namedtuple("ImageSizes", ["original", "large", "largesquare", "medium", "small", "extralarge"])
Image = _namedtuple("Image", ["title", "url", "dateadded", "format", "owner", "sizes", "votes"])
Shout = _namedtuple("Shout", ["body", "author", "date"])
def _string_output(funct):
def r(*args):
return _string(funct(*args))
return r
class _BaseObject(object):
"""An abstract webservices object."""
network = None
def __init__(self, network):
self.network = network
def _request(self, method_name, cacheable = False, params = None):
if not params:
params = self._get_params()
return _Request(self.network, method_name, params).execute(cacheable)
def _get_params(self):
"""Returns the most common set of parameters between all objects."""
return {}
def __hash__(self):
return hash(self.network) + \
hash(str(type(self)) + "".join(self._get_params().keys() + self._get_params().values()).lower())
class _Taggable(object):
"""Common functions for classes with tags."""
def __init__(self, ws_prefix):
self.ws_prefix = ws_prefix
def add_tags(self, *tags):
"""Adds one or several tags.
* *tags: Any number of tag names or Tag objects.
"""
for tag in tags:
self._add_tag(tag)
def _add_tag(self, tag):
"""Adds one or several tags.
* tag: one tag name or a Tag object.
"""
if isinstance(tag, Tag):
tag = tag.get_name()
params = self._get_params()
params['tags'] = _unicode(tag)
self._request(self.ws_prefix + '.addTags', False, params)
def _remove_tag(self, single_tag):
"""Remove a user's tag from this object."""
if isinstance(single_tag, Tag):
single_tag = single_tag.get_name()