我正在寻找一个python脚本，它可以在整个网页中搜索一个**（特定单词）**。所以在我环顾youtube后，我发现youtube上的人说“Scrapy比bs 4更好”。
所以我尝试使用Visual Studio / Pycharm，但出现以下错误：

File D:\ScrapyProject\Scripts\activate.ps1 cannot be loaded. The file D:\ScrapyProject\Scripts\activate.ps1 is not digitally signed. You cannot run this script on    
the current system. For more information about running scripts and setting execution policy, see about_Execution_Policies at 
https:/go.microsoft.com/fwlink/?LinkID=135170.
    + CategoryInfo          : SecurityError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : UnauthorizedAccess
scrapy : The term 'scrapy' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was    
included, verify that the path is correct and try again.
At line:1 char:1
+ scrapy
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (scrapy:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

都说动力壳必须更新（我已经更新到最新版本7.2.5）

set-executionpolicy unrestricted

有些人说我最喜欢

set-executionpolicy allow all

却不能解决问题
那么，有人能帮助解决这个错误吗？
还有，scrapy能帮我在整个网页中找到特定的短语吗？