Python package that lets you run multiple versions of code in parallel in a single interpreter session via virtual environments. Example:
importsubenv# Paths to Python interpreters (e.g. different conda, uv, or venv environments)OLD="/old/starsim/env/bin/python"NEW="/new/starsim/env/bin/python"# Create the environmentsenv_old=subenv.Env(OLD)
env_new=subenv.Env(NEW)
cmd1="import starsim as ss"env_old.exec(cmd1)
env_new.exec(cmd1)
cmd2="res = ss.Sim().run().results"env_old.exec(cmd2)
env_new.exec(cmd2)
res_old=env_old.get('res')
res_new=env_new.get('res')
print("old:", res_old)
print("new:", res_new)
env_old.close()
env_new.close()