开一篇博客作为Python备忘录

Python模拟浏览器登陆网站

方式一，使用httplib2模块:参考资料

http = httplib2.Http()
myuri = 'http://www.2-vpn3.org/lr.action'
mybody = {'user.nick': 'NAME', 'user.password': 'PASSWORD','validationCode': 'VCODE'} 
myheaders = {'Content-type': 'application/x-www-form-urlencoded'}
response, content = http.request(myuri, 'POST', headers=myheaders,     body=urlencode(mybody))
myheaders = {'Cookie': response['set-cookie']}
myuri = 'http://www.2-vpn3.org/home!sl.action'
response, content = http.request(uri=myuri, method='GET', headers=myheaders)

方式二，使用urllib2模块:

import urllib2
headers = {'User-Agent':'Mozilla/5.0 (Linux; U; Android 2.3.6; zh-cn; GT-S5660 Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 MicroMessenger/4.5.255'}
req = urllib2.Request(url = 'http://dict.youdao.com/search?q=manipulate&keyfrom=dict.index', headers = headers)
res = urllib2.urlopen(req)
html = res.read()

Tip: 可以使用Chrome的开发者模式下Network工具来分析数据包。

Python正则表达式

ips = re.findall(r'\d+\.\d+\.\d+\.\d+', content) #寻找ip地址，返回列表

# 判断record中是否包含日期 #
if re.search('\[[0-9].[0-3]*[0-9]\]', record):
    do_something()

Python验证码识别

安装依赖库:

sudo apt-get install python-pil
sudo apt-get install tesseract-ocr
sudo pip install pytesserac

使用:

import pytesseract
from PIL import Image
image = Image.open('vcode.jpg')
vcode = pytesseract.image_to_string(image)

预处理去噪：

# import Image
# import ImageFilter
img = Image.open('vdcode_img.png')
img = img.convert('RGB').filter(ImageFilter.GaussianBlur)
pixdata = img.load()

for y in xrange(img.size[1]):
     for x in xrange(img.size[0]):
          if pixdata[x,y][0] > 220:
               pixdata[x,y] = (255,255,255)


for y in xrange(img.size[1]):
      for x in xrange(img.size[0]):
          if pixdata[x,y][1] > 180:
               pixdata[x,y] = (255,255,255)

for y in xrange(img.size[1]):
     for x in xrange(img.size[0]):
          if pixdata[x,y][2] > 220:
               pixdata[x,y] = (255,255,255)

img.show()