yes, SRE uses loads of python, despite a decade+ pseudo-mandate to encourage Go
I never saw Python actually get used, though, in the projects I worked on.
First, there are two SRE ladders: SRE-SWE and SRE-SysEng. SRE-SWE have the same interviews and hiring bar as SWEs. SysEng have less coding interviews but I think the interview questions are more practical and less algorithm oriented.
Still, SREs are subject to the same rules and policies as SWEs when it comes to submitting code.
And in the end, I don't see why using python on some projects would be a bad engineering practice
Google can definitely afford (in technical terms) to be a follower rather than a leader when it comes to Python.