python爬取的图片无法显示的问题_采集图片无效不显示怎么回事

 1 # -*- coding: utf-8 -*-
 2 import urllib
 3 import time
 4 import os
 5 
 6 #显示下载进度
 7 def schedule(a,b,c):
 8     #a:已下载的数据块 b:数据块的大小 c:远程文件的大小
 9     per = 100.0 * a * b / c
10     if per > 100 :
11         per = 100
12     print '%.2f%%' % per
13 
14 if __name__ == '__main__':
15     url = "http://img4.imgtn.bdimg.com/it/u=3459898135,859507693&fm=11&gp=0.jpg"
16     #定义文件名 时间命名
17     t = time.localtime(time.time())
18     #反斜杠连接多行
19     filename = str(t.__getattribute__("tm_year")) + "_" + \
20                str(t.__getattribute__("tm_mon")) + "_" + \
21                str(t.__getattribute__("tm_mday"))
22     target = "%s.jpg" % filename
23     print target
24     urllib.urlretrieve(url,target,schedule)
25     print "Download Picture!!!"

>>> help(urllib.urlretrieve)
Help on function urlretrieve in module urllib:
urlretrieve(url, filename=None, reporthook=None, data=None)

参数url：
    指定的下载路径
参数 finename：
    指定了保存本地路径（如果参数未指定，urllib会生成一个临时文件保存数据。）
参数 reporthook：
    是一个回调函数，当连接上服务器、以及相应的数据块传输完毕时会触发该回调，
    我们可以利用这个回调函数来显示当前的下载进度。
参数 data：
    指 post 到服务器的数据，该方法返回一个包含两个元素的(filename, headers)元组，
    filename 表示保存到本地的路径，header 表示服务器的响应头。

 1 # -*- coding: utf-8 -*-
 2 import os      
 3 import sys    
 4 import urllib
 5 import urllib2
 6 
 7 #设置消息头
 8 url = "http://img4.imgtn.bdimg.com/it/u=3459898135,859507693&fm=11&gp=0.jpg"
 9 header = {
10     'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) \
11         AppleWebKit/537.36 (KHTML, like Gecko) \
12         Chrome/35.0.1916.114 Safari/537.36',
13     'Cookie': 'AspxAutoDetectCookieSupport=1'
14 }
15 request = urllib2.Request(url, None, header)
16 response = urllib2.urlopen(request)
17 print response.headers['Content-Length']
18 
19 with open("picture.jpg","wb") as f:
20     f.write(response.read())
21 print response.geturl()
22 print response.info()    #返回报文头信息
23 print urllib2.urlopen(url).read()

 1 # -*- coding: utf-8 -*-
 2 import urllib
 3 import re
 4 import time
 5 import os
 6 from selenium import webdriver          
 7 from selenium.webdriver.common.keys import Keys
 8 import selenium.webdriver.support.ui as ui        
 9 from selenium.webdriver.common.action_chains import ActionChains
10 
11 #Open PhantomJS
12 #driver = webdriver.PhantomJS(executable_path="G:\phantomjs-1.9.1-windows\phantomjs.exe")  
13 driver = webdriver.Firefox() 
14 wait = ui.WebDriverWait(driver,10)
15 
16 #Search Picture By Baidu
17 url = "http://image.baidu.com/"
18 name = u"邓肯"
19 driver.get(url)
20 elem_inp = driver.find_element_by_xpath("//form[@id='homeSearchForm']/span[1]/input")  
21 elem_inp.send_keys(name)  
22 elem_inp.send_keys(Keys.RETURN)
23 time.sleep(5)
24 
25 #Get the URL of Pictures
26 num = 1
27 elem_pic = driver.find_elements_by_xpath("//div[@class='imgpage']/ul/li")
28 for elem in elem_pic:
29     elem_url = elem.get_attribute("data-objurl")
30     print elem_url
31     #Download Pictures
32     name = "%03d" % num
33     urllib.urlretrieve(elem_url, str(name) + ".jpg")
34     num = num + 1
35 else:
36     print "Download Pictures!!!"

 1 # -*- coding: utf-8 -*-
 2 import urllib
 3 import re
 4 import time
 5 import os
 6 from selenium import webdriver          
 7 from selenium.webdriver.common.keys import Keys
 8 import selenium.webdriver.support.ui as ui        
 9 from selenium.webdriver.common.action_chains import ActionChains
10 
11 #Open PhantomJS 
12 driver = webdriver.Firefox()
13 wait = ui.WebDriverWait(driver,10)
14 
15 #Search Picture By Baidu
16 url = "http://image.baidu.com/"
17 name = u"邓肯"
18 driver.get(url)
19 elem_inp = driver.find_element_by_xpath("//form[@id='homeSearchForm']/span[1]/input")  
20 elem_inp.send_keys(name)  
21 elem_inp.send_keys(Keys.RETURN)
22 time.sleep(5)
23 
24 #Get the URL of Pictures
25 elem_pic = driver.find_element_by_xpath("//div[@class='imgpage']/ul/li/div/a/img")
26 elem_url = elem_pic.get_attribute("src")
27 print elem_url
28 
29 #鼠标移动至图片上 右键保存图片
30 driver.get(elem_url)
31 print driver.page_source
32 elem = driver.find_element_by_xpath("//img")
33 action = ActionChains(driver).move_to_element(elem)
34 action.context_click(elem) #右键  
35 
36 #当右键鼠标点击键盘光标向下则移动至右键菜单第一个选项
37 action.send_keys(Keys.ARROW_DOWN)
38 action.send_keys('v') #另存为
39 action.perform()
40 print "Download Pictures!!!"