1、安装scrapy
执行命令：python -m pip install --upgrade pip
执行命令：pip install scrapy
查看版本：scrapy version
此时可能会遇见报错：Fatal error in launcher: Unable to create process using '"c:python27python.exe" "C:Python27Scriptspip.exe" install scrap 处理方案为：python -m pip install scrapy
2、Windows查看安装的python个数
执行命令：where python
