Python实现提取谷歌音乐搜索结果的方法

本文实例讲述了Python实现提取谷歌音乐搜索结果的方法。分享给大家供大家参考。具体如下：

Python的简单脚本，用于提取谷歌音乐搜索页面中的歌曲信息，包括歌曲名，作者，专辑名，现在链接等，最多只提取10页结果。

#! /usr/bin/env python
#coding=utf-8
'''
Created on 2011-8-19
@author: yaoboyuan
'''
from urllib import request,parse
import re,sys
def extractSongRawData(text):
  '抓取每一首歌的原始数据'
  text = re.sub('\n+','',text)
  songList = re.findall('\ ',text)
  nums = len(songList)
  print('search ' + str(nums) + ' songs')
  return songList
def translate(text):
  '去掉text中的无用字符，转换unicode码'
  text = re.sub('\','',text)
  text = re.sub('\ ','',text)
  #find the 成 and translate into chinese
  s = re.findall('&#([0-9]+);',text)
  if len(s) )',song)
  name = re.findall('.+?\(.*?)\',td[0])
  songName = translate(name[0])
  return songName
def extractAuthorName(song):
  '提取作者名字'
  td = re.findall('(?:\ )',song)
  name = re.findall('.+?\(.*?)\',td[0])
  authorName = name[0]
  authorName = translate(authorName)
  return authorName
def extrackAlbumName(song):
  '提取专辑名字'
  td = re.findall('(?:\ )',song)
  name = re.findall('.+?\(.*?)\',td[0])
  albumName = translate(name[0])
  return albumName
def extractID(song):
  '提取歌曲id'
  td = re.findall('''\ 0:
    return td[0]
  else:
    return song
def extractLink(song):
  '提取歌曲下载链接'
  td = re.findall('''\ ''',song)
  if len(td) == 0:
    return 'NULL'
  s = str(td[0])
  rawLink = re.findall('http.*?(?=\?)',s)
  if len(rawLink) == 0:
    return s
  link = rawLink[0]
  link = re.sub('%3D','=',link)
  id = extractID(song)
  return link + '?id=' + id
def extractPageNums(text):
  '提取返回结果的页数，最多要10页'
  pageList = re.findall('page_link',text)
  return len(pageList)
def extractSongInfo(song):
  '提取歌曲信息，返回歌曲列表'
  songList = []
  for i in range(len(song)):
    songName = extractSongName(song[i])
    authorName = extractAuthorName(song[i])
    albumName = extrackAlbumName(song[i])
    link = extractLink(song[i])
    songItem = [songName,authorName,albumName,link]
    songList.append(songItem)
    index = ''
    if i 0:
      for i in range(num):
        start = (i+1)*20
        next_page = '&cat=song&start=%d'%(start)
        #next_page = parse.quote(next_page) #统一编码成utf-8
        url += next_page
        mf = request.urlopen(url)
        c = mf.readall()
        c = str(c,encoding = 'utf-8')
        song = extractSongRawData(c)
        songList += extractSongInfo(song) #find all results
    for i in range(len(songList)): #print the result
      index = ''
      if i 

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