练习-前程无忧数据爬取

目标

只爬取python的搜索结果

第一页

https://search.51job.com/list/000000,000000,0000,00,9,99,python,2,1.html?lang=c&stype=&postchannel=0000&workyear=99&cotype=99&degreefrom=99&jobterm=99&companysize=99&providesalary=99&lonlat=0%2C0&radius=-1&ord_field=0&confirmdate=9&fromType=&dibiaoid=0&address=&line=&specialarea=00&from=&welfare=

第二页

https://search.51job.com/list/000000,000000,0000,00,9,99,python,2,2.html?lang=c&postchannel=0000&workyear=99&cotype=99&degreefrom=99&jobterm=99&companysize=99&ord_field=0&dibiaoid=0&line=&welfare=

第三页

https://search.51job.com/list/000000,000000,0000,00,9,99,python,2,3.html?lang=c&postchannel=0000&workyear=99&cotype=99&degreefrom=99&jobterm=99&companysize=99&ord_field=0&dibiaoid=0&line=&welfare=

第六百页

https://search.51job.com/list/000000,000000,0000,00,9,99,python,2,600.html?lang=c&postchannel=0000&workyear=99&cotype=99&degreefrom=99&jobterm=99&companysize=99&ord_field=0&dibiaoid=0&line=&welfare=

总页码数 733 在response中

            共733页，到第页确定

如果要爬java招聘信息

第一页
```cpp
https://search.51job.com/list/000000,000000,0000,00,9,99,java,2,1.html?lang=c&stype=&postchannel=0000&workyear=99&cotype=99&degreefrom=99&jobterm=99&companysize=99&providesalary=99&lonlat=0%2C0&radius=-1&ord_field=0&confirmdate=9&fromType=&dibiaoid=0&address=&line=&specialarea=00&from=&welfare=

第二页

https://search.51job.com/list/000000,000000,0000,00,9,99,java,2,2.html?lang=c&postchannel=0000&workyear=99&cotype=99&degreefrom=99&jobterm=99&companysize=99&ord_field=0&dibiaoid=0&line=&welfare=

## 需 求

第一版
- 完成python岗位的数据抓取 
- 数据存到文件中
- 可以搜索文件， 按照地点搜索  ，简单的搜索功 能（ 搜索的时 候不要再次爬取了）


第二版
-自 定 义搜索岗位， 可以 搜索java  可以搜搜php等岗位