python爬虫小实例

1、python爬取贴吧壁纸

1.1、获取整个页面数据

#coding=utf-8
import urllib

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html

html = getHtml("http://tieba.baidu.com/p/2738151262")

print html
复制代码

1.2、筛选页面中想要的数据

import re
import urllib

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html

def getImg(html):
    reg = r'src="(.+?\.jpg)" '
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    return imglist      

html = getHtml("http://tieba.baidu.com/p/2460150866")
print getImg(html)

1.3、将页面筛选的数据保存到本地

#coding=utf-8
import urllib
import re

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html

def getImg(html):
    reg = r'src="(.+?\.jpg)" '
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    x = 0
    for imgurl in imglist:
        urllib.urlretrieve(imgurl,'%s.jpg' % x)
        x+=1

html = getHtml("http://tieba.baidu.com/p/2460150866")

print getImg(html)

抓取昵图网图片 --修改版

#coding=utf-8
import urllib
import re

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html

def getImg(html):
    reg = r'src="(.*?)" '
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    x = 0
    for imgurl in imglist:
        urllib.urlretrieve(imgurl,'D:360\\%s.jpg' % x)
        x+=1

html = getHtml("http://www.nipic.com/show/17742538.html")

print getImg(html)

解释：

%s意思是字符串参数，就是将变量的值传入到字符串里面，字符串后的'%'后就是写要传入的参数。
在你给出的例子中，就是用x的值替代%s。比如说x=5，那么就是爬取url后面是'5.jpg'这个图片

保存的位置默认为程序的存放目录

如何保存到指定目录：urllib.urlretrieve(imgurl,'D:360\\%s.jpg' % x)

https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=false&word

2、python抓取价格

前两个不用加 text

#-*—coding:utf8-*-
from lxml import etree

import urllib
import urllib.request
#headers构造一个字典，里面保存了user-agent
#headers= { 'User-Agent' : 'User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36' }
url="http://search.jd.com/Search?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&pvid=194960f41c994e81ada43edbc276f54b"
html = urllib.request.urlopen(url).read()
data=html.decode('utf-8')
selector = etree.HTML(data)
#xpath
qiubai_text = selector.xpath('//div/ul/li/div/div/strong/i/text()')
#print(qiubai_text)
for i in qiubai_text:
    print(i)

或者

#-*—coding:utf8-*-
from lxml import etree

import urllib
import urllib.request
#headers构造一个字典，里面保存了user-agent
#headers= { 'User-Agent' : 'User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36' }
url="http://search.jd.com/Search?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&pvid=194960f41c994e81ada43edbc276f54b"
html = urllib.request.urlopen(url).read()
selector = etree.HTML(html)
#xpath
qiubai_text = selector.xpath('//div/ul/li/div/div/strong/i/text()')
#print(qiubai_text)
for i in qiubai_text:
    print(i)

或者    ：注意：这个需要加text         html.text

#-*—coding:utf8-*-
from lxml import etree
import requests
#headers构造一个字典，里面保存了user-agent
#headers= { 'User-Agent' : 'User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36' }
url="http://search.jd.com/Search?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&pvid=194960f41c994e81ada43edbc276f54b"
html = requests.get(url)
selector = etree.HTML(html.text)
#xpath
qiubai_text = selector.xpath('//div/ul/li/div/div/strong/i/text()')
#print(qiubai_text)
for i in qiubai_text:
    print(i)

3、python爬取昵图网图片

#coding=utf-8
import urllib
import re

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html

def getImg(html):
    reg = r'src="(.*?)" '
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    x = 0
    for imgurl in imglist:
        urllib.urlretrieve(imgurl,'D:360\\%s.jpg' % x)
        x+=1

html = getHtml("http://www.nipic.com/show/17742538.html")

print getImg(html)

4、爬音乐

# coding:utf-8
import urllib
import urllib.request
import re
url="http://www.yy8844.cn/ting/ccceo/ceeivi.shtml"
html = urllib.request.urlopen(url).read()
data=html.decode('GBK')
#print(data)
music_id = int(re.findall(r'MusicId=(\d+)',data)[0])
music_name = re.findall(r'<title>(.*?)</title>',data)[0].split('/')[0].strip()
music_word = re.findall(r'<div class="textgeci_show" id="showtext">(.*?)</div>',data,re.S)[0]
article='word'
with open("%s.txt" % article,'w') as f:
    f.write(music_word)
#print(music_word)
quanurl="http://96.ierge.cn/"'%d/%d/%s' % (music_id//30000,music_id//2000,music_id)+".mp3"
#print(quanurl)
bata=urllib.request.urlopen(quanurl).read()
with open("%s.mp3" % music_name,'wb') as f:
    f.write(bata)

注意问题：

music_word = re.findall(r'<div class="textgeci_show" id="showtext">(.*?)</div>',data,re.S)[0]

python中AttributeError解决

【Python 脚本报错】AttributeError:'module' has no attribute 'xxx'的解决方法
http://blog.csdn.net/cn_wk/article/details/50839159

int库的.pyc文件

python 去掉 .pyc
http://blog.csdn.net/ubuntu64fan/article/details/48241985

python操作对象属性
http://www.jianshu.com/p/c38a81b8cb38

Python学习日记4|python爬虫常见报错小结及解决方法

http://www.jianshu.com/p/17c921639ad0

#coding=utf-8
from Tkinter import *
import  tkMessageBox
import urllib
import json
import mp3play
import time
import threading
from pinyin import PinYin
import os
import stat
test = PinYin()
test.load_word()
stop=0
def music():
    if not entry.get():
        tkMessageBox.showinfo("温馨提示","搜索内容不能为空")
        return
    name = test.hanzi2pinyin_split(entry.get())
    html=urllib.urlopen("http://s.music.163.com/search/get/?type=1&s=%s&limit=9"%name).read()
    js=json.loads(html)
    n = 0
    global x
    x = []
    for i in js['result']['songs']:
        listbox.insert(n,'%s(%s)'%(i['name'],i['artists'][0]['name']))
        n+=1
        x.append(i['audio'])
count = 0
#isplaying = None
def play():
    global count
    count += 1
    index=listbox.curselection()
    var1.set(u"正在加载"+listbox.get(index,last=None))
    urllib.urlretrieve(x[index[0]],'tmp%s.mp3'%str(count))
    var1.set(u"正在播放"+listbox.get(index,last=None))
    mp3=mp3play.load("tmp%s.mp3"%str(count))
    mp3.play()
    time.sleep(mp3.seconds())

import inspect
import ctypes

def _async_raise(tid, exctype):
    """raises the exception, performs cleanup if needed"""
    tid = ctypes.c_long(tid)
    if not inspect.isclass(exctype):
        exctype = type(exctype)
    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
    if res == 0:
        raise ValueError("invalid thread id")
    elif res != 1:
        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
        raise SystemError("PyThreadState_SetAsyncExc failed")

def stop_thread(thread):
    _async_raise(thread.ident, SystemExit)
threads=list()
t=None
def excute(event):
    global  t
    for i in threads:
        stop_thread(i)
    t = threading.Thread(target=play)
    t.setDaemon(True)
    t.start()
    threads.append(t)
root = Tk()#创建一个窗口
root.title("云音乐")
root.geometry("500x300+500+200")
entry=Entry(root)#创建输入框（单行）,置父
entry.pack()
btn=Button(root,text="搜 索",command=music)
btn.pack()#布局方式必须用同一种
var=StringVar()
listbox=Listbox(root,width=50,listvariable=var)
listbox.bind('<Double-Button-1>',excute)
listbox.pack()
var1=StringVar()
label=Label(root,text="云音乐播放器",fg="purple",textvariable=var1)
var1.set("云音乐播放器")
label.pack()
root.mainloop()#显示窗口