图形工具：如何访问复制图形的属性(Graph-tool: How to access properties of a copied graph)

 根据您的日志，似乎您的404错误是由Drive API请求上返回的403错误引起的。 
 
 来自Google API的错误通常在其正文中包含解释。 在你的情况下： 
 
"error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "dailyLimitExceededUnreg",
    "message": "Daily Limit Exceeded. Please sign up",
    "extendedHelp": "https://code.google.com/apis/console"
   }
  ],
  "code": 403,
  "message": "Daily Limit Exceeded. Please sign up"
 }
}
 
 这通常意味着您尚未在Google API控制台项目中启用对Google Drive API的访问权限。 为此： 
 
 
 
 在Google API控制台中打开您的项目 
 
 
 转到服务部分 
 
 
 单击开/关切换启用Drive SDK和Drive API 
 
 
 不要忘了在Drive SDK部分配置您的应用程序，并在** API Access部分配置您的OAuth设置 
 
 
 这一切都在我们的文档的入门>注册应用程序部分中描述。 您还应该确保您阅读“ 入门”的其他小节。 

I eventually managed to get it working. I'm not sure what was the problem before, but here are some tips for those who are facing similar problems:
 
 
 
The "Client ID for web applications" and the "Client ID for Drive SDK" confused me. Unfortunately the documentation doesn't tell you which one to use at which place, but it seems like you only need the "Client ID for web applications".
 
 
If you update your Chrome extension or the API console it could take some time until Drive recognizes those changes. For example, changing the OAuth Client ID in the API console could take some time until it takes effect, since everybody's caching. If you are testing your application, deleting cache and cookies helps speed up the process.
 
 
Good luck with your applications, and thanks to everybody who helped me!