前一段时间爬取一些网页数据需要获取其的验证码，然后拼接url获取数据。然后通过看其验证码形式，就是一些简单的字母加数字，然后加燥的验证码。然后网上百度了一下，Python可以做一些简单的验证码破解。具体操作如下：
一：windows安装相应的包：
1.先安装Pillow:pip install Pillow
2.安装tesseract-ocr：安装的下载地址：https://ask.hellobi.com/blog/tangyudi/（引用的链接地址）
3.安装pytesseract： pip install pytesseract
tesseract_cmd=r'C:\Program Files (x86)\Tesseract-OCR\tesseract.exe'
请根据这个链接进行安装：http://blog.csdn.net/diandianxiyu_geek/article/details/50522582（引用的网址）
# -*- coding:utf-8 -*-
import
sys
reload
(sys)
sys.setdefaultencoding(
'utf-8'
)
import
urllib
from
PIL
import
Image,ImageEnhance
import
pytesseract
import
requests
import
time
import
re
from
lxml
import
etree
from
PublicCode
import
search_config
# 破解验证码
t =
int
(
round
(time.time()*
1000
))
def
get_guid(t,
second_header
):
url=
'http://cri.gz.gov.cn/Search/NewGuid?t=%s'
%t
result =requests.get(url,search_config.second_header)
return
result.content
def
get_image(guid):
url=
'http://cri.gz.gov.cn/Search/ValidateCode?t=1517210875615&guid=%s'
%guid
res = requests.get(url)
with
open
(
'1.jpg'
,
"wb"
)
as
f:
f.write(res.content)
res = Image.open(
'1.jpg'
)
return
res
threshold =
150
table = []
for
i
in
range
(
256
):
if
i < threshold:
table.append(
0
)
else
:
table.append(
1
)
def
getverify1(name):
im = Image.open(name)
imgry = im.convert(
'L'
)
imgry.save(
'g'
+ name)
out = imgry.point(table,
'1'
)
out.save(
'b'
+ name)
string =
'--tessdata-dir "C:
\\
Program Files (x86)
\\
Tesseract-OCR
\\
tessdata"'
im = Image.open(
'b1.jpg'
)
enhancer = ImageEnhance.Contrast(im)
im = enhancer.enhance(
6
)
text = pytesseract.image_to_string(im,
config
=string)
text = text.strip(
''
)
text = text.upper();
return
text
def
main():
guid = get_guid(t, search_config.second_header)
get_image(guid)
date = getverify1(
'1.jpg'
)
return
guid,date