{"action":"created","issue":{"url":"https://api.github.com/repos/pybee/travertino/issues/3","repository_url":"https://api.github.com/repos/pybee/travertino","labels_url":"https://api.github.com/repos/pybee/travertino/issues/3/labels{/name}","comments_url":"https://api.github.com/repos/pybee/travertino/issues/3/comments","events_url":"https://api.github.com/repos/pybee/travertino/issues/3/events","html_url":"https://github.com/pybee/travertino/issues/3","id":341579030,"node_id":"MDU6SXNzdWUzNDE1NzkwMzA=","number":3,"title":"Allowing 'none' Values for a Choice","user":{"login":"mcrowson","id":6452882,"node_id":"MDQ6VXNlcjY0NTI4ODI=","avatar_url":"https://avatars2.githubusercontent.com/u/6452882?v=4","gravatar_id":"","url":"https://api.github.com/users/mcrowson","html_url":"https://github.com/mcrowson","followers_url":"https://api.github.com/users/mcrowson/followers","following_url":"https://api.github.com/users/mcrowson/following{/other_user}","gists_url":"https://api.github.com/users/mcrowson/gists{/gist_id}","starred_url":"https://api.github.com/users/mcrowson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mcrowson/subscriptions","organizations_url":"https://api.github.com/users/mcrowson/orgs","repos_url":"https://api.github.com/users/mcrowson/repos","events_url":"https://api.github.com/users/mcrowson/events{/privacy}","received_events_url":"https://api.github.com/users/mcrowson/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-07-16T15:59:05Z","updated_at":"2018-07-16T23:51:29Z","closed_at":null,"author_association":"NONE","body":"In Toga, possible choices are given for display and visibility of 'none'\r\nhttps://github.com/pybee/toga/blob/master/src/core/toga/style/pack.py#L33\r\n\r\nEntering a valid entry of 'none' for these however gets converted to the native Python None\r\nhttps://github.com/pybee/travertino/blob/master/travertino/declaration.py#L51\r\n\r\nWhich causes a ValueError to be raised. \r\nValueError: Invalid value 'none' for property 'visibility'; Valid values are: hidden, none, visible\r\n"},"comment":{"url":"https://api.github.com/repos/pybee/travertino/issues/comments/405415340","html_url":"https://github.com/pybee/travertino/issues/3#issuecomment-405415340","issue_url":"https://api.github.com/repos/pybee/travertino/issues/3","id":405415340,"node_id":"MDEyOklzc3VlQ29tbWVudDQwNTQxNTM0MA==","user":{"login":"stantonxu","id":6853681,"node_id":"MDQ6VXNlcjY4NTM2ODE=","avatar_url":"https://avatars3.githubusercontent.com/u/6853681?v=4","gravatar_id":"","url":"https://api.github.com/users/stantonxu","html_url":"https://github.com/stantonxu","followers_url":"https://api.github.com/users/stantonxu/followers","following_url":"https://api.github.com/users/stantonxu/following{/other_user}","gists_url":"https://api.github.com/users/stantonxu/gists{/gist_id}","starred_url":"https://api.github.com/users/stantonxu/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/stantonxu/subscriptions","organizations_url":"https://api.github.com/users/stantonxu/orgs","repos_url":"https://api.github.com/users/stantonxu/repos","events_url":"https://api.github.com/users/stantonxu/events{/privacy}","received_events_url":"https://api.github.com/users/stantonxu/received_events","type":"User","site_admin":false},"created_at":"2018-07-16T23:51:28Z","updated_at":"2018-07-16T23:51:28Z","author_association":"NONE","body":"@mcrowson , could you please list out the detailed reproduce steps? I don't have problem to use `style=None` for my toga GUI."}}
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