{"action":"created","issue":{"url":"https://api.github.com/repos/heroku/heroku-buildpack-python/issues/705","repository_url":"https://api.github.com/repos/heroku/heroku-buildpack-python","labels_url":"https://api.github.com/repos/heroku/heroku-buildpack-python/issues/705/labels{/name}","comments_url":"https://api.github.com/repos/heroku/heroku-buildpack-python/issues/705/comments","events_url":"https://api.github.com/repos/heroku/heroku-buildpack-python/issues/705/events","html_url":"https://github.com/heroku/heroku-buildpack-python/pull/705","id":328368311,"node_id":"MDExOlB1bGxSZXF1ZXN0MTkxOTI1Njg2","number":705,"title":"Fix incorrenct pip version in pip-uninstall step","user":{"login":"jxltom","id":1401630,"node_id":"MDQ6VXNlcjE0MDE2MzA=","avatar_url":"https://avatars3.githubusercontent.com/u/1401630?v=4","gravatar_id":"","url":"https://api.github.com/users/jxltom","html_url":"https://github.com/jxltom","followers_url":"https://api.github.com/users/jxltom/followers","following_url":"https://api.github.com/users/jxltom/following{/other_user}","gists_url":"https://api.github.com/users/jxltom/gists{/gist_id}","starred_url":"https://api.github.com/users/jxltom/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jxltom/subscriptions","organizations_url":"https://api.github.com/users/jxltom/orgs","repos_url":"https://api.github.com/users/jxltom/repos","events_url":"https://api.github.com/users/jxltom/events{/privacy}","received_events_url":"https://api.github.com/users/jxltom/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-06-01T03:29:44Z","updated_at":"2018-09-28T08:45:46Z","closed_at":"2018-09-28T08:45:46Z","author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/heroku/heroku-buildpack-python/pulls/705","html_url":"https://github.com/heroku/heroku-buildpack-python/pull/705","diff_url":"https://github.com/heroku/heroku-buildpack-python/pull/705.diff","patch_url":"https://github.com/heroku/heroku-buildpack-python/pull/705.patch"},"body":"Try to fix #700 \r\n\r\nCurrently pip version is pinned to ```9.0.2``` and is installed in ```/steps/python```\r\n\r\nThen pipenv is installed in ```steps/pipenv```. This step will also upgrade pipenv which means pip is changed back to latest version 10.\r\n\r\nFinally ```steps/pip-uninstall``` is called and this step will call ```pip-diff``` which called ```from pip.req import parse_requirements```. However, pip 10 does not has ```pip.req``` and then exception is raised.\r\n\r\nSo ```--upgrade-strategy only-if-needed``` is added when installing ```pipenv``` to make sure only ```pipenv``` is upgraded while ```pip``` is kept as older version."},"comment":{"url":"https://api.github.com/repos/heroku/heroku-buildpack-python/issues/comments/425367012","html_url":"https://github.com/heroku/heroku-buildpack-python/pull/705#issuecomment-425367012","issue_url":"https://api.github.com/repos/heroku/heroku-buildpack-python/issues/705","id":425367012,"node_id":"MDEyOklzc3VlQ29tbWVudDQyNTM2NzAxMg==","user":{"login":"jxltom","id":1401630,"node_id":"MDQ6VXNlcjE0MDE2MzA=","avatar_url":"https://avatars3.githubusercontent.com/u/1401630?v=4","gravatar_id":"","url":"https://api.github.com/users/jxltom","html_url":"https://github.com/jxltom","followers_url":"https://api.github.com/users/jxltom/followers","following_url":"https://api.github.com/users/jxltom/following{/other_user}","gists_url":"https://api.github.com/users/jxltom/gists{/gist_id}","starred_url":"https://api.github.com/users/jxltom/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jxltom/subscriptions","organizations_url":"https://api.github.com/users/jxltom/orgs","repos_url":"https://api.github.com/users/jxltom/repos","events_url":"https://api.github.com/users/jxltom/events{/privacy}","received_events_url":"https://api.github.com/users/jxltom/received_events","type":"User","site_admin":false},"created_at":"2018-09-28T08:45:46Z","updated_at":"2018-09-28T08:45:46Z","author_association":"CONTRIBUTOR","body":"Close since latest version of pipenv requires pip 10. The ```pip-diff``` should support pip 10 instead."}}
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