1. The need to install:
1.1python, anconda (containing many libraries)
1.2 Request Libraries (pip installation): requests (anconda own); selenium (automated testing tools, drivers browser to complete a specific action, the main features of this tool include: compatibility testing with the browser - Test your application to see whether well have to work on different browsers and operating systems testing system functionality - create regression testing test software functionality and user needs support automatic recording action and automatically generate .Net, Java, Perl and other test scripts in different languages , the Selenium for reptiles, mainly used to solve problems javascript rendering); aiohttp (providing asynchronous web services);
1.3 parsing library: lxml (parsing library, anconda own); beautifulsoup ( parsing library, anconda own )
1.4 Database: MySQL relational database
1.5 Repository: PyMySQL
1.6 crawler frame: pyspider
2.chorme version View of error code 3: 0x80040154 , Rom, few people can be in the morning to try.
3.windows terminal switching directories: cd directory to be switched (which can go directly to D: \ MySQL \ mysql-8.0.17-winx64 \ bin), then input C / D / E / F :( cdef to which disk, it colon input uppercase + D :).
4: URI: Uniform Resource Identifier; URL: Uniform Resource Locator (http access protocols, access path, resource name); URN (Uniform Resource Name, but not uniquely identify the positioning of resources). URL and URN belong URI.
5.CSS in: # id ,. representatives on behalf of class. Blank space for nesting relationship