# Missing python3.6 on xcode9.4 **URL:** \ **Category:** macOS\ **Created:** [December 21, 2019, 10:55pm UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588 "2019-12-21T22:55:15Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Borda](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/borda/32/3471_2.png) [@Borda](https://travis-ci.community/u/Borda)\ **Post date:** [December 21, 2019, 10:55pm UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/1 "2019-12-21T22:55:15Z")
Just recently I found an issue with missing python 3.6 on default xcode 9.4 image even it should be there according to the docs - [https://blog.travis-ci.com/2019-08-07-extensive-python-testing-on-travis-ci](https://blog.travis-ci.com/2019-08-07-extensive-python-testing-on-travis-ci) Sample failing build is here: [https://travis-ci.org/Borda/pytorch-lightning/jobs/626454896](https://travis-ci.org/Borda/pytorch-lightning/jobs/626454896) and message: ``` $ tox --sitepackages GLOB sdist-make: /Users/travis/build/Borda/pytorch-lightning/setup.py py36 create: /Users/travis/build/Borda/pytorch-lightning/.tox/py36 ERROR: InterpreterNotFound: python3.6 ``` and about a week ago it was fine… [https://travis-ci.org/Borda/pytorch-lightning/jobs/624751287](https://travis-ci.org/Borda/pytorch-lightning/jobs/624751287) ---
**Author:** ![native-api](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/native-api/32/430_2.png) [@native-api](https://travis-ci.community/u/native-api)\ **Post date:** [December 22, 2019, 12:15am UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/2 "2019-12-22T00:15:55Z")
[https://blog.travis-ci.com/2019-08-07-extensive-python-testing-on-travis-ci](https://blog.travis-ci.com/2019-08-07-extensive-python-testing-on-travis-ci) is a blog entry. The facts given there were probably true at the time of writing but cannot be guaranteed to _stay_ true. [My test shows 2.7.17 and 3.7.5 atm](https://travis-ci.org/native-api/test_travis/builds/628227804). The official documentation is [https://docs.travis-ci.com/user/reference/osx/](https://docs.travis-ci.com/user/reference/osx/) and it doesn’t guarantee any specific Python version. All it guarantees is `pyenv` Homebrew package. - You are pretty safe to rely on _some_ version of Python 2 and Python 3 from Homebrew to be present because it’s a widely used dependency. But not on its version. - You can use `pyenv` but it builds versions from source which takes time - Consider using [https://github.com/matthew-brett/multibuild](https://github.com/matthew-brett/multibuild) which has the functionality to install prebuilt Python OSX releases from the official site. ---
**Author:** ![Borda](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/borda/32/3471_2.png) [@Borda](https://travis-ci.community/u/Borda)\ **Post date:** [December 22, 2019, 9:16am UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/3 "2019-12-22T09:16:32Z")
ok, so do you have any idea why adding python 3.6 via addon didn’t work? ``` - os: osx osx_image: xcode9.4 language: generic env: TOXENV=py36 addons: homebrew: # update: true packages: python3.6 before_install: - pip3 install virtualenv - virtualenv -p python3 ~/venv - source ~/venv/bin/activate ``` ---
**Author:** ![native-api](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/native-api/32/430_2.png) [@native-api](https://travis-ci.community/u/native-api)\ **Post date:** [December 22, 2019, 9:30am UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/4 "2019-12-22T09:30:45Z")
[https://travis-ci.org/Borda/pytorch-lightning/jobs/626454896#L86](https://travis-ci.org/Borda/pytorch-lightning/jobs/626454896#L86) ---
**Author:** ![Borda](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/borda/32/3471_2.png) [@Borda](https://travis-ci.community/u/Borda)\ **Post date:** [December 22, 2019, 10:55am UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/5 "2019-12-22T10:55:24Z")
I see, do you have an advice how to properly add Python 3.6? I have tried to set it up bit then it does not download it… ``` - os: osx osx_image: xcode9.4 python: 3.6 env: TOXENV=py36 ``` see [https://travis-ci.org/Borda/BIRL/jobs/628424065](https://travis-ci.org/Borda/BIRL/jobs/628424065) ``` travis_0.01s0.01s3.6 is not installed; attempting download Downloading archive: https://storage.googleapis.com/travis-ci-language- archives/python/binaries/osx/10.13/x86_64/python-3.6.tar.bz20.19s$ curl -sSf --retry 5 -o python-3.6.tar.bz2 ${archive_url} curl: (22) The requested URL returned error: 404 Unable to download 3.6 archive. The archive may not exist. Please consider a different version. ``` ---
**Author:** ![Borda](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/borda/32/3471_2.png) [@Borda](https://travis-ci.community/u/Borda)\ **Post date:** [December 22, 2019, 11:29pm UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/6 "2019-12-22T23:29:59Z")
similar to 🙄: - [Python versions (for matrix build) not available for macOS](https://travis-ci.community/t/python-versions-for-matrix-build-not-available-for-macos/3351) - [https://github.com/travis-ci/travis-ci/issues/9744](https://github.com/travis-ci/travis-ci/issues/9744) - [https://github.com/travis-ci/travis-ci/issues/9815#issuecomment-401590901](https://github.com/travis-ci/travis-ci/issues/9815#issuecomment-401590901) ---
**Author:** ![Borda](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/borda/32/3471_2.png) [@Borda](https://travis-ci.community/u/Borda)\ **Post date:** [December 26, 2019, 10:46pm UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/7 "2019-12-26T22:46:43Z")
Well, but the point is different; obviously, the image changed `xcode9.4` even image should be frozen… Also, the env variable `DISPLAY` is not passed on properly as other tests are freezing because of a suppressed input waiting… ---
**Author:** ![native-api](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/native-api/32/430_2.png) [@native-api](https://travis-ci.community/u/native-api)\ **Post date:** [December 27, 2019, 3:49am UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/8 "2019-12-27T03:49:44Z")
There’s no guarantee in the docs that “image should be frozen”. Previously, Travis staff did say that “images were frozen” on a number of occasions and that caused many complaints because they wouldn’t fix bugs in them. ---
**Author:** ![Borda](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/borda/32/3471_2.png) [@Borda](https://travis-ci.community/u/Borda)\ **Post date:** [December 27, 2019, 8:18am UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/9 "2019-12-27T08:18:10Z")
well, on the other hand, it is like changes something in released SW. now my case is that I debug it for a particular version and suddenly it fails without any external (mine) change… this is very inconvenient behaviour… I guess they want to make a change in 9.4, then they should release 9.5 ---
**Author:** ![muschellij2](https://sea1.discourse-cdn.com/flex015/user_avatar/travis-ci.community/muschellij2/32/2532_2.png) [@muschellij2](https://travis-ci.community/u/muschellij2)\ **Post date:** [February 3, 2020, 9:45pm UTC](https://travis-ci.community/t/missing-python3-6-on-xcode9-4/6588/10 "2020-02-03T21:45:31Z")
Just saw this on [https://docs.travis-ci.com/user/languages/python/:](https://docs.travis-ci.com/user/languages/python/:) ![Screen Shot 2020-02-03 at 4.44.30 PM](https://us1.discourse-cdn.com/flex015/uploads/travis_ci/original/2X/0/088b8a3219b303a777c6bac66751930e9242ddec.png)