{"action":"created","issue":{"url":"https://api.github.com/repos/jupyter/notebook/issues/1247","repository_url":"https://api.github.com/repos/jupyter/notebook","labels_url":"https://api.github.com/repos/jupyter/notebook/issues/1247/labels{/name}","comments_url":"https://api.github.com/repos/jupyter/notebook/issues/1247/comments","events_url":"https://api.github.com/repos/jupyter/notebook/issues/1247/events","html_url":"https://github.com/jupyter/notebook/issues/1247","id":142748302,"number":1247,"title":"Better traceback.","user":{"login":"Carreau","id":335567,"avatar_url":"https://avatars.githubusercontent.com/u/335567?v=3","gravatar_id":"","url":"https://api.github.com/users/Carreau","html_url":"https://github.com/Carreau","followers_url":"https://api.github.com/users/Carreau/followers","following_url":"https://api.github.com/users/Carreau/following{/other_user}","gists_url":"https://api.github.com/users/Carreau/gists{/gist_id}","starred_url":"https://api.github.com/users/Carreau/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Carreau/subscriptions","organizations_url":"https://api.github.com/users/Carreau/orgs","repos_url":"https://api.github.com/users/Carreau/repos","events_url":"https://api.github.com/users/Carreau/events{/privacy}","received_events_url":"https://api.github.com/users/Carreau/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2016-03-22T19:07:37Z","updated_at":"2016-03-23T18:11:00Z","closed_at":null,"body":"Again, JupyterDay Boston, \r\n\r\nI had also many request for \"HTML expandable tracebacks\". This might be more an IPython issue, i just don't remember if tracebacks support mimetype in notebooks.  "},"comment":{"url":"https://api.github.com/repos/jupyter/notebook/issues/comments/200472070","html_url":"https://github.com/jupyter/notebook/issues/1247#issuecomment-200472070","issue_url":"https://api.github.com/repos/jupyter/notebook/issues/1247","id":200472070,"user":{"login":"minrk","id":151929,"avatar_url":"https://avatars.githubusercontent.com/u/151929?v=3","gravatar_id":"","url":"https://api.github.com/users/minrk","html_url":"https://github.com/minrk","followers_url":"https://api.github.com/users/minrk/followers","following_url":"https://api.github.com/users/minrk/following{/other_user}","gists_url":"https://api.github.com/users/minrk/gists{/gist_id}","starred_url":"https://api.github.com/users/minrk/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/minrk/subscriptions","organizations_url":"https://api.github.com/users/minrk/orgs","repos_url":"https://api.github.com/users/minrk/repos","events_url":"https://api.github.com/users/minrk/events{/privacy}","received_events_url":"https://api.github.com/users/minrk/received_events","type":"User","site_admin":false},"created_at":"2016-03-23T18:11:00Z","updated_at":"2016-03-23T18:11:00Z","body":"I don't recall a proposal for a new message type. My understanding of the plan was to extend the existing `error` message with richer data (possibly mimebundle, possibly structured in a more traceback-centric way), so that exceptions can be better rendered."}}