4 ms·

Except... they mostly are? As far as I can tell, Debian only ships one Python per major version per release, Fedora does the same, Arch does the same. Gentoo le

Except... they mostly are? As far as I can tell, Debian only ships one Python per major version per release, Fedora does the same, Arch does the same. Gentoo lets you install everything side-by-side, but it does the same thing for gcc, binutils, ruby, wine, llvm, and dozens of other packages, and I don't see the author complaining about those.

lmm 8y ago
Well, it sounds like this author's employer required their devs to use multiple minor versions at once: > I was advised by one teammate that I needed to configure my environment so that everything uses the Python 3.5 base. This worked great until I started on a second project that needed Python 3.6. Might be an issue specific to that company of course.
- ApolloFortyNine 8y ago
  I think that whole paragraph he mixed up python 2 and 3. >However, Python installs in separate installations. My code for Python 3.5 won't work with the Python 3.7 installation unless I intentionally port it to 3.7. Enough Linux developers have decided that porting isn't worth the effort, so Ubuntu installs with both Python2 and Python3 -- because they are needed by different core functions. The way he just segways from talking about 3.5 to 3.7 seems really unnatural, I think he's talking more about from python 2 to 3, since that's what the second sentence is about. All code from 3.5 should work 3.7, unless they were using some undefined behavior of some sorts. A quick google reveals python 3.6 is fully backwards compatible with 3.5, and 3.7 has only 2 exceptions. The words async and await are now reserved. So even if he did have a problem with this, any ide, or even just a find replace in a text editor, would be able to refactor the 3.5 code to work. >https://docs.python.org/3/whatsnew/3.7.html https://docs.python.org/3/whatsnew/3.7.html
  - lmm 8y ago
    > All code from 3.5 should work 3.7, unless they were using some undefined behavior of some sorts. Interesting; that certainly wasn't always the policy (e.g. I remember 2.4 -> 2.5 being a major, breaking upgrade) and maybe his employer never got the memo. If it's now the case that you can do fearless upgrades between minor versions then maybe that just needs to be better advertised.

lmm 8y ago

Well, it sounds like this author's employer required their devs to use multiple minor versions at once: > I was advised by one teammate that I needed to configure my environment so that everything uses the Python 3.5 base. This worked great until I started on a second project that needed Python 3.6. Might be an issue specific to that company of course.

ApolloFortyNine 8y ago
I think that whole paragraph he mixed up python 2 and 3. >However, Python installs in separate installations. My code for Python 3.5 won't work with the Python 3.7 installation unless I intentionally port it to 3.7. Enough Linux developers have decided that porting isn't worth the effort, so Ubuntu installs with both Python2 and Python3 -- because they are needed by different core functions. The way he just segways from talking about 3.5 to 3.7 seems really unnatural, I think he's talking more about from python 2 to 3, since that's what the second sentence is about. All code from 3.5 should work 3.7, unless they were using some undefined behavior of some sorts. A quick google reveals python 3.6 is fully backwards compatible with 3.5, and 3.7 has only 2 exceptions. The words async and await are now reserved. So even if he did have a problem with this, any ide, or even just a find replace in a text editor, would be able to refactor the 3.5 code to work. >https://docs.python.org/3/whatsnew/3.7.html https://docs.python.org/3/whatsnew/3.7.html
- lmm 8y ago
  > All code from 3.5 should work 3.7, unless they were using some undefined behavior of some sorts. Interesting; that certainly wasn't always the policy (e.g. I remember 2.4 -> 2.5 being a major, breaking upgrade) and maybe his employer never got the memo. If it's now the case that you can do fearless upgrades between minor versions then maybe that just needs to be better advertised.