Ubuntu pkg_resources.DistributionNotFound: The 'Scrapy==1.0.3' distribution was not found and is required by the application

在Ubuntu16.0.4上安装scrapy，参考：Ubuntu16.04安装Scrapy命令

都安装成功后，import scrapy也都没出错，但是在终端输入：scrapy 命令时出现错误：

File "/usr/local/python2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 870, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'Scrapy==1.0.3' distribution was not found and is required by the application

             【翻译： pkg_resources.DistributionNotFound：'Scrapy == 1.0.3'发行版没有被发现，并且是应用程序所要求的】

 

找原因：pip install scrapy默认给安装的scrapy版本是Scrapy 1.0.3-1       而给出的提示是应用程序需要Scrapy 1.0.3

解决方法：在终端输入：sudo pip install Scrapy==1.0.3

 

这样问题就解决了，在终端输入：scrapy   出现如下