Python is actually designed in such way that you can install multiple major versions and they can coexist perfectly fine together.
For example you can install python 2.6, 2.7, 3.3, 3.4, & 3.5 all on one host without any conflicts. The limitation is that many distributions prefer to not maintain different versions of supposedly the same language.
If you use RedHat or CentOS you can just use https://ius.io/ and get access to the other python versions. This is one of few repos that makes sure the packages don't conflict with system ones.
For example you can install python 2.6, 2.7, 3.3, 3.4, & 3.5 all on one host without any conflicts. The limitation is that many distributions prefer to not maintain different versions of supposedly the same language.
If you use RedHat or CentOS you can just use https://ius.io/ and get access to the other python versions. This is one of few repos that makes sure the packages don't conflict with system ones.