> Does SublimeText not offer a Python 2 linter?
SublimeText is written in Python, so for simplicity, the Python-based plugins, including the linters, use the bundled interpreters. SublimeText 3 is built on Python 3, so thus the linters are as well. It's conceivable that someone has gone to the trouble of supporting external Python linters (as SublimeText also supports many other languages).