我在下面的代码中迭代了一些曲目。然后对于每个曲目，我想使用musixmatch api根据艺术家姓名和曲目名称获取和打印曲目的歌词。
通过某些曲目迭代并打印歌词的代码：
for i, v in tracks.items():
artist = tracks[i]['artist'].replace(" ", "+")
title = tracks[i]['title'].replace(" ", "+")
print(tracks)
print(song_lyric(title, artist))
打印（曲目）以这种格式返回：
{12: {'trackID': 12, 'title': 'Achtung Baby', 'number': '1', 'artist': 'U2', 'album': 'Achtung Baby', 'albumID': 2, 'duration': '291'}
当代码退出时，会打印第一首曲目的歌词，但之后会出现错误：
Traceback (most recent call last):
File "C:/Users/Ozzy/PycharmProjects/getData/getData.py", line 239, in <module>
print(song_lyric(title, artist))
File "C:/Users/Ozzy/PycharmProjects/getData/getData.py", line 72, in song_lyric
lyrics_tracking(tracking_url)
File "C:/Users/Ozzy/PycharmProjects/getData/getData.py", line 79, in lyrics_tracking
request = urllib.request.Request(querystring)
File "C:\Users\Ozzy\AppData\Local\Programs\Python\Python36\lib\urllib\request.py", line 329, in __init__
self.full_url = url
File "C:\Users\Ozzy\AppData\Local\Programs\Python\Python36\lib\urllib\request.py", line 355, in full_url
self._parse()
File "C:\Users\Ozzy\AppData\Local\Programs\Python\Python36\lib\urllib\request.py", line 384, in _parse
raise ValueError("unknown url type: %r" % self.full_url)
ValueError: unknown url type: ''
你知道为什么会出现这个错误吗？
从musixmatch获取歌词的方法是公开的：
def song_lyric(song_name, artist_name):
while True:
querystring = apiurl_musixmatch + "matcher.lyrics.get?q_track=" + urllib.parse.quote(
song_name) + "&q_artist=" + urllib.parse.quote(
artist_name) + "&apikey=" + apikey_musixmatch + "&format=json&f_has_lyrics=1"
# matcher.lyrics.get?q_track=sexy%20and%20i%20know%20it&q_artist=lmfao
request = urllib.request.Request(querystring)
# request.add_header("Authorization", "Bearer " + client_access_token)
request.add_header("User-Agent",
"curl/7.9.8 (i686-pc-linux-gnu) libcurl 7.9.8 (OpenSSL 0.9.6b) (ipv6 enabled)") # Must include user agent of some sort, otherwise 403 returned
while True:
try:
response = urllib.request.urlopen(request,
timeout=4) # timeout set to 4 seconds; automatically retries if times out
raw = response.read()
except socket.timeout:
print("Timeout raised and caught")
continue
break
json_obj = json.loads(raw.decode('utf-8'))
body = json_obj["message"]["body"]["lyrics"]["lyrics_body"]
copyright = json_obj["message"]["body"]["lyrics"]["lyrics_copyright"]
tracking_url = json_obj["message"]["body"]["lyrics"]["html_tracking_url"]
#print(tracking_url)
lyrics_tracking(tracking_url)
return (body + "\n\n" + copyright)
def lyrics_tracking(tracking_url):
while True:
querystring = tracking_url
request = urllib.request.Request(querystring)
# request.add_header("Authorization", "Bearer " + client_access_token)
request.add_header("User-Agent",
"curl/7.9.8 (i686-pc-linux-gnu) libcurl 7.9.8 (OpenSSL 0.9.6b) (ipv6 enabled)") # Must include user agent of some sort, otherwise 403 returned
try:
response = urllib.request.urlopen(request,
timeout=4) # timeout set to 4 seconds; automatically retries if times out
raw = response.read()
except socket.timeout:
print("Timeout raised and caught")
continue
break
print(raw)
重现错误的完整工作示例：
import requests
import json
import urllib.request, urllib.error, urllib.parse
import socket
apikey_musixmatch = '0b4a363bbd71974c2634837d5b5d1d9a' #generated for the example
apiurl_musixmatch = 'http://api.musixmatch.com/ws/1.1/'
api_key = "b088cbedecd40b35dd89e90f55227ac2" #generated for the example
def song_lyric(song_name, artist_name):
while True:
querystring = apiurl_musixmatch + "matcher.lyrics.get?q_track=" + urllib.parse.quote(
song_name) + "&q_artist=" + urllib.parse.quote(
artist_name) + "&apikey=" + apikey_musixmatch + "&format=json&f_has_lyrics=1"
# matcher.lyrics.get?q_track=sexy%20and%20i%20know%20it&q_artist=lmfao
request = urllib.request.Request(querystring)
# request.add_header("Authorization", "Bearer " + client_access_token)
request.add_header("User-Agent",
"curl/7.9.8 (i686-pc-linux-gnu) libcurl 7.9.8 (OpenSSL 0.9.6b) (ipv6 enabled)") # Must include user agent of some sort, otherwise 403 returned
while True:
try:
response = urllib.request.urlopen(request,
timeout=4) # timeout set to 4 seconds; automatically retries if times out
raw = response.read()
except socket.timeout:
print("Timeout raised and caught")
continue
break
json_obj = json.loads(raw.decode('utf-8'))
body = json_obj["message"]["body"]["lyrics"]["lyrics_body"]
copyright = json_obj["message"]["body"]["lyrics"]["lyrics_copyright"]
tracking_url = json_obj["message"]["body"]["lyrics"]["html_tracking_url"]
print("Tracking_url====================" +tracking_url + "==================================")
lyrics_tracking(tracking_url)
return (body + "\n\n" + copyright)
def lyrics_tracking(tracking_url):
while True:
querystring = tracking_url
request = urllib.request.Request(querystring)
# request.add_header("Authorization", "Bearer " + client_access_token)
request.add_header("User-Agent",
"curl/7.9.8 (i686-pc-linux-gnu) libcurl 7.9.8 (OpenSSL 0.9.6b) (ipv6 enabled)") # Must include user agent of some sort, otherwise 403 returned
try:
response = urllib.request.urlopen(request,
timeout=4) # timeout set to 4 seconds; automatically retries if times out
raw = response.read()
except socket.timeout:
print("Timeout raised and caught")
continue
break
print(raw)
ID = 0
#get top artists from country
artists = {}
for i in range(2, 3):
artists_response = requests.get(
'http://ws.audioscrobbler.com/2.0/?method=geo.gettopartists&country=spain&format=json&page=' + str(i) + '&api_key=' + api_key)
artists_data = artists_response.json()
for artist in artists_data["topartists"]["artist"]:
name = artist["name"]
url = artist["url"]
if ID > 1: continue
artists[ID] = {}
artists[ID]['ID'] = ID
artists[ID]['name'] = name
ID += 1
for i, v in artists.items():
chosen = artists[i]['name'].replace(" ", "+")
artist_response = requests.get(
'http://ws.audioscrobbler.com/2.0/?method=artist.getinfo&format=json&artist=' + chosen + '&api_key=' + api_key)
artist_data = artist_response.json()
# get top albums of the artists
albums = {}
for i, v in artists.items():
chosen = artists[i]['name'].replace(" ", "+")
topalbums_response = requests.get(
'http://ws.audioscrobbler.com/2.0/?method=artist.gettopalbums&format=json&artist=' + chosen + '&api_key=' + api_key + '&limit=5')
albums_data = topalbums_response.json()
for album in albums_data['topalbums']['album']:
name = album["name"]
url = album["url"]
albums[ID] = {}
albums[ID]['ID'] = ID
albums[ID]['artist'] = artists[i]['name']
albums[ID]['artistID'] = artists[i]['ID']
albums[ID]['name'] = name
ID += 1
# Get tracks of the album
tracks = {}
for i, v in albums.items():
artist = albums[i]['artist'].replace(" ", "+")
name = albums[i]['name'].replace(" ", "+")
album_response_data = requests.get(
'http://ws.audioscrobbler.com/2.0/?method=album.getinfo&format=json&api_key=' + api_key + '&artist=' + artist + '&album=' + name)
album_response = album_response_data.json()
for album in album_response['album']['tracks']['track']:
title = album['name']
tracks[ID] = {}
tracks[ID]['trackID'] = ID
tracks[ID]['title'] = title
tracks[ID]['artist'] = albums[i]['artist']
tracks[ID]['album'] = albums[i]['name']
tracks[ID]['albumID'] = albums[i]['ID']
ID += 1
for i, v in tracks.items():
artist = tracks[i]['artist'].replace(" ", "+")
title = tracks[i]['title'].replace(" ", "+")
# print the lyric of each track
print(song_lyric(title, artist))
答案 0 :(得分：2)
似乎网址不正确。它发生在这里：
tracking_url = json_obj["message"]["body"]["lyrics"]["html_tracking_url"]
如果您能够在本地运行该API并查看返回到tracking_url的内容，则可以找出它仍然存在的问题。
我重现了它，因此urllib.request无法处理空字符串网址：""，这就是为什么你需要检查tracking_url != ""是否只有非空字符串或者你是需要请求这首歌。