> language that is as similar to Python as possible without requiring a global lock
Something like Pony[0] or Nim[1]? I'm not very familiar with either one, but Nim says it is inspired by Python, and on the surface Pony appears to be as well.
[0] https://bluishcoder.co.nz/2015/11/04/a-quick-look-at-pony.ht...