本文实例讲述了python实现下载指定网址所有图片的方法。分享给大家供大家参考。具体实现方法如下：

#coding=utf-8
#download pictures of the url
#useage: python downpicture.py www.baidu.com
import os
import sys
from html.parser import HTMLParser
from urllib.request import urlopen
from urllib.parse import urlparse
def getpicname(path):
  \'\'\'  retrive filename of url    \'\'\'
  if os.path.splitext(path)[1] == \'\':
    return None
  pr=urlparse(path)
  path=\'http://\'+pr[1]+pr[2]
  return os.path.split(path)[1]
def saveimgto(path, urls):
  \'\'\'
  save img of url to local path
  \'\'\'
  if not os.path.isdir(path):
    print(\'path is invalid\')
    sys.exit()
  else:
    for url in urls:
      of=open(os.path.join(path, getpicname(url)), \'w+b\')
      q=urlopen(url)
      of.write(q.read())
      q.close()
      of.close()
class myhtmlparser(HTMLParser):
  \'\'\'put all src of img into urls\'\'\'
  def __init__(self):
    HTMLParser.__init__(self)
    self.urls=list()
    self.num=0
  def handle_starttag(self, tag, attr):
    if tag.lower() == \'img\':
      srcs=[u[1] for u in attr if u[0].lower() == \'src\']
      self.urls.extend(srcs)
      self.num = self.num+1
if __name__ == \'__main__\':
  url=sys.argv[1]
  if not url.startswith(\'http://\'):
    url=\'http://\' + sys.argv[1]
  parseresult=urlparse(url)
  domain=\'http://\' + parseresult[1]
  q=urlopen(url)
  content=q.read().decode(\'utf-8\', \'ignore\')
  q.close()
  myparser=myhtmlparser()
  myparser.feed(content)
  for u in myparser.urls:
    if (u.startswith(\'//\')):
      myparser.urls[myparser.urls.index(u)]= \'http:\'+u
    elif u.startswith(\'/\'):
      myparser.urls[myparser.urls.index(u)]= domain+u
  saveimgto(r\'D:\\python\\song\', myparser.urls)
  print(\'num of download pictures is {}\'.format(myparser.num))

运行结果如下：

num of download pictures is 19

希望本文所述对大家的Python程序设计有所帮助。