程式碼部分

#Python 3.5
#Author: A_lPha
#Blog: http://blog.csdn.net/a_lpha

import json
from urllib.request import urlopen
from urllib.error import HTTPError

print("*" * 8,"網易雲音樂下載器", "*" * 8,"\n")
ID = input('請輸入歌曲ID:\n>>> ')
url = "http://music.163.com/api/song/detail/?ids=[" + ID + "]"
html = urlopen(url).read().decode("utf-8"
 
)
rejson = json.loads(html)
for name in rejson['songs']:
    print('歌曲ID: ',name['id'])
    print('歌曲名稱: ',''.join(name['name']))
    print('歌手: ',''.join(names['name'] for names in name['artists']))
    print('mp3連結: ',name['mp3Url'])

num = int(input('\n是否下載?(輸入1下載該歌曲,輸入其他數字關閉程式.)\n'))
if num == 1
 
:
    try:
        f = open(str(''.join(name['name']) + "-" + ''.join(names['name'] for names in name['artists'])) + ".mp3", "wb")
        req = urlopen(name['mp3Url'])
        buf = req.read()
        f.write(buf)
        f.close()
        print("已儲存")
    except HTTPError as e:
        print("遇到錯誤啦! 錯誤程式碼是這個: \n"
 
,">>>>>>",e,"<<<<<<","\n我猜這是付費歌曲的'ID'，可能是網站不讓下載吧！")
elif num != 1:
    print("已關閉")

找網易雲音樂歌曲的ID方法，在網易雲音樂搜尋到該歌曲，開啟播放頁面，在瀏覽器位址列後顯示該歌曲ID。

一般情況下可以找到歌曲的連結，付費歌曲也可以找到連結，但是返回404錯誤。

程式碼很簡單，現在還沒發現其他問題。

==================================更新==================================

#Python 3.5
#Author: A_lPha
#Blog: http://blog.csdn.net/a_lpha

import json
import time
from urllib.request import urlopen
from urllib.error import HTTPError

print("*" * 8,"網易雲音樂下載器", "*" * 8,"\n")

def getId():
    try:
        ID = int(input('請輸入歌曲ID:\n>>> '))
        print("正在查詢，請稍後...\n")
        time.sleep(0.9)
        return ID
    except:
        print("請輸入正確的ID！\n")
        getId()

def getInformations(ID):
    print("--"*4,"查詢結果","--"*4)
    try:
        ID = str(ID)
        url = "http://music.163.com/api/song/detail/?ids=["+ID+"]"
        html = urlopen(url).read().decode("utf-8")
        rejson = json.loads(html)
        for informations in rejson['songs']:
            print('歌曲ID: ', informations['id'])
            print('歌曲名稱: ', ''.join(informations['name']))
            print('歌手: ', ''.join(names['name'] for names in informations['artists']))
            print('mp3連結: ', informations['mp3Url'])
        song = ''.join(informations['name'])
        name = ''.join(names['name'] for names in informations['artists'])
        mp3url = informations['mp3Url']
        return song,name,mp3url
    except:
        print("這個可能不是正確的ID哦！重新試試吧。")
        id = getId()
        song, name, mp3url = getInformations(id)
        getUrl(song, name, mp3url)
def getUrl(song,name,mp3url):
    print("-"*9, "下載", "-"*9)
    num = int(input('是否下載?(輸入1下載該歌曲,輸入其他數字關閉程式.)\n'))
    if num == 1:
        try:
            filename = str(song + "-" + name)
            with open(filename + ".mp3", "wb") as mp:
                infor = urlopen(mp3url).read()
                mp.write(infor)
            print("已儲存！")
        except HTTPError as e:
            print("遇到錯誤啦! 錯誤程式碼是這個: \n", ">>>>>>", e, "<<<<<<", "\n我猜這是付費歌曲的'ID'，可能是網站不讓下載吧！")
    elif num != 1:
        print("已關閉。")

id = getId()
song, name, mp3url = getInformations(id)
getUrl(song, name, mp3url)

這段程式碼處理了異常，介面也清晰了許多。不過程式碼還是有些臃腫。