text: #! /usr/bin/python3.9
  
  """
  Script to run Python regression tests.
  
  Run this script with -h or --help for documentation.
  """
  
  import os
  import sys
  from test.libregrtest import main
  
  
  # Alias for backward compatibility (just in case)
  main_in_temp_cwd = main
  
  
  def _main():
      global __file__
  
      # Remove regrtest.py's own directory from the module search path. Despite
      # the elimination of implicit relative imports, this is still needed to
      # ensure that submodules of the test package do not inappropriately appear
      # as top-level modules even when people (or buildbots!) invoke regrtest.py
      # directly instead of using the -m switch
      mydir = os.path.abspath(os.path.normpath(os.path.dirname(sys.argv[0])))
      i = len(sys.path) - 1
      while i >= 0:
          if os.path.abspath(os.path.normpath(sys.path[i])) == mydir:
              del sys.path[i]
          else:
              i -= 1
  
      # findtestdir() gets the dirname out of __file__, so we have to make it
      # absolute before changing the working directory.
      # For example __file__ may be relative when running trace or profile.
      # See issue #9323.
      __file__ = os.path.abspath(__file__)
  
      # sanity check
      assert __file__ == os.path.abspath(sys.argv[0])
  
      main()
  
  
  if __name__ == '__main__':
      _main()
  