No, it doesn't. The extensions are usually too inaccurate to rely on. That could be either a Bourne or Bash script, meaning it could either fail at some arbitr

No, it doesn't. The extensions are usually too inaccurate to rely on. That could be either a Bourne or Bash script, meaning it could either fail at some arbitrary point during run if the wrong one is used, or just subtly, critically change some output. Much more true for Python scripts.