code: func (i *Interpreter) IsolatedCommand(c context.Context, target Target, args ...string) *exec.Cmd {
  	// Isolate the supplied arguments.
  	cl := CommandLine{
  		Target: target,
  		Args:   args,
  	}
  	cl.SetIsolatedFlags()
  	cmd := exec.CommandContext(c, i.Python, cl.BuildArgs()...)
  	if i.testCommandHook != nil {
  		i.testCommandHook(cmd)
  	}
  	return cmd
  }
docs: // IsolatedCommand returns a configurable exec.Cmd structure bound to this
  // Interpreter.
  //
  // The supplied arguments have several Python isolation flags prepended to them
  // to remove environmental factors such as:
  //	- The user's "site.py".
  //	- The current PYTHONPATH environment variable.
  //	- Compiled ".pyc/.pyo" files.