if dirs[dir] {
					break
				}
				dirs[dir] = true
			}

			idx := len(r.fileList)
			entry := fileListEntry{
				name:  name,
				file:  file,
				isDir: isDir,
			}
			r.fileList = append(r.fileList, entry)
			if isDir {
				knownDirs[name] = idx
			} else {
				files[name] = idx
			}
		}
		for dir := range dirs {
			if _, ok := knownDirs[dir]; !ok {

pkg os, method (*PathError) Unwrap() error
pkg os, method (FileMode) IsDir() bool
pkg os, method (FileMode) IsRegular() bool
pkg os, method (FileMode) Perm() FileMode
pkg os, method (FileMode) String() string
pkg os, type FileInfo interface { IsDir, ModTime, Mode, Name, Size, Sys }
pkg os, type FileInfo interface, IsDir() bool
pkg os, type FileInfo interface, ModTime() time.Time

	testenv.MustHaveGoBuild(t)

	td, err := os.Open("testdata/src/pkg")
	if err != nil {
		t.Fatal(err)
	}
	fis, err := td.Readdir(0)
	if err != nil {
		t.Fatal(err)
	}
	for _, fi := range fis {
		if !fi.IsDir() {
			continue
		}

		// TODO(gri) remove extra pkg directory eventually
		goldenFile := filepath.Join("testdata", "src", "pkg", fi.Name(), "golden.txt")
		w := NewWalker(nil, "testdata/src/pkg")

        ])
    ]

  all_paths = set(python_paths + library_paths)
  # Sort set so order is deterministic
  all_paths = sorted(all_paths)

  paths = []
  for path in all_paths:
    if os.path.isdir(path):
      paths.append(path)
  return paths


def get_python_major_version(python_bin_path):
  """Get the python major version."""

		}
		hdr, err := tr.Next()
		if err == io.EOF {
			break // End of archive
		}
		if err != nil {
			t.Fatal(err)
		}

		tmpName := name
		if entryInfo.IsDir() {
			tmpName += "/"
		}
		if hdr.Name != tmpName {
			t.Errorf("test fs has filename %v; archive header has %v",
				name, hdr.Name)
		}

		if entryInfo.Mode() != hdr.FileInfo().Mode() {

	w.imported[name] = &importing

	// Determine package files.
	dir := w.importDir[name]
	if dir == "" {
		dir = filepath.Join(w.root, filepath.FromSlash(name))
	}
	if fi, err := os.Stat(dir); err != nil || !fi.IsDir() {
		log.Panicf("no source in tree for import %q (from import %s in %s): %v", name, fromPath, fromDir, err)
	}

	context := w.context
	if context == nil {
		context = &build.Default
	}