old_contents: """
  This script ensures that some dependencies are _not_ installed in the
  current python environment.
  
  This is to ensure that tests with minimal dependencies are not tainted
  by too many installed packages.
  """
  
  from typing import List
  
  # These are taken from `setup.py` for ray[default]
  DEFAULT_BLACKLIST = [
      "aiohttp",
      "aiohttp_cors",
      "colorful",
      "py-spy",
      # "requests",
      "gpustat",
      "opencensus",
      "prometheus_client",
      "smart_open",
  ]
  
  
  def assert_packages_not_installed(blacklist: List[str]):
      try:
          from pip._internal.operations import freeze
      except ImportError:  # pip < 10.0
          from pip.operations import freeze
  
      installed_packages = [p.split("==")[0].split(" @ ")[0] for p in freeze.freeze()]
  
      assert not any(p in installed_packages for p in blacklist), (
          f"Found blacklisted packages in installed python packages: "
          f"{[p for p in blacklist if p in installed_packages]}. "
          f"Minimal dependency tests could be tainted by this. "
          f"Check the install logs and primary dependencies if any of these "
          f"packages were installed as part of another install step."
      )
  
      print(
          f"Confirmed that blacklisted packages are not installed in "
          f"current Python environment: {blacklist}"
      )
  
  
  if __name__ == "__main__":
      assert_packages_not_installed(DEFAULT_BLACKLIST)
  
new_contents: """
  This script ensures that some dependencies are _not_ installed in the
  current python environment.
  
  This is to ensure that tests with minimal dependencies are not tainted
  by too many installed packages.
  """
  
  from typing import List
  
  # These are taken from `setup.py` for ray[default]
  DEFAULT_BLACKLIST = [
      "aiohttp",
      "aiohttp_cors",
      "colorful",
      "py-spy",
      "gpustat",
      "opencensus",
      "prometheus_client",
      "smart_open",
  ]
  
  
  def assert_packages_not_installed(blacklist: List[str]):
      try:
          from pip._internal.operations import freeze
      except ImportError:  # pip < 10.0
          from pip.operations import freeze
  
      installed_packages = [p.split("==")[0].split(" @ ")[0] for p in freeze.freeze()]
  
      assert not any(p in installed_packages for p in blacklist), (
          f"Found blacklisted packages in installed python packages: "
          f"{[p for p in blacklist if p in installed_packages]}. "
          f"Minimal dependency tests could be tainted by this. "
          f"Check the install logs and primary dependencies if any of these "
          f"packages were installed as part of another install step."
      )
  
      print(
          f"Confirmed that blacklisted packages are not installed in "
          f"current Python environment: {blacklist}"
      )
  
  
  if __name__ == "__main__":
      assert_packages_not_installed(DEFAULT_BLACKLIST)
  
subject: Remove `requests` from blacklist of minimal install test (#20584)