def get_bower_package(self, url, dest=None, version=None,
                          process_deps=True):
        dest = dest or Path(".") / "assets"
        parsed_url = urlparse(url)
        if parsed_url.scheme == "git" or parsed_url.path.endswith(".git"):
            if parsed_url.netloc == "github.com":
                user, repo = parsed_url.path[1:-4].split("/")
                response = get(github_api_uri +
                               "/repos/{}/{}/tags".format(user, repo))
                tags = response.json()
                target = None
                if not len(tags):
                    click.secho("fatal: no tags exist for {}/{}".format(
                        user, repo), fg="red")
                    raise InvalidPackageError
                if version is None:
                    target = tags[0]
                else:
                    for tag in tags:
                        if semver.match(tag["name"],
                                        Bower.clean_semver(version)):
                            target = tag
                            break
                if not target:
                    click.secho(
                        "fatal: failed to find matching tag for "
                        "{user}/{repo} {version}".format(user, repo, version),
                        fg="red")
                    raise VersionNotFoundError
                click.secho("installing {}/{}#{}".format(
                    user, repo, tags[0]["name"]), fg="green")
                return self.get_bower_package(
                    url=target["zipball_url"],
                    dest=dest,
                    version=version)
            raise NotImplementedError
            click.echo("git clone {url}".format(url=url))
            cmd = envoy.run('git clone {url} "{dest}"'.format(
                url=url, dest=dest))
        elif parsed_url.scheme in ("http", "https"):
            zip_dest = download_file(url, dest=self.temp_dir,
                                     label="{dest_basename}",
                                     expected_extension="zip")
            with zipfile.ZipFile(zip_dest, "r") as pkg:
                return self.extract_bower_zipfile(pkg, dest,
                                                  expected_version=version)
                # pkg.extractall(str(dest))
        else:
            click.secho("protocol currently unsupported :(")
            sys.exit(1)
def __init__(self, root, split="train", pass_name="clean", camera="left", transforms=None):
        super().__init__(root=root, transforms=transforms)

        verify_str_arg(split, "split", valid_values=("train", "test"))
        split = split.upper()

        verify_str_arg(pass_name, "pass_name", valid_values=("clean", "final", "both"))
        passes = {
            "clean": ["frames_cleanpass"],
            "final": ["frames_finalpass"],
            "both": ["frames_cleanpass", "frames_finalpass"],
        }[pass_name]

        verify_str_arg(camera, "camera", valid_values=("left", "right", "both"))
        cameras = ["left", "right"] if camera == "both" else [camera]

        root = Path(root) / "FlyingThings3D"

        directions = ("into_future", "into_past")
        for pass_name, camera, direction in itertools.product(passes, cameras, directions):
            image_dirs = sorted(glob(str(root / pass_name / split / "*/*")))
            image_dirs = sorted(Path(image_dir) / camera for image_dir in image_dirs)

            flow_dirs = sorted(glob(str(root / "optical_flow" / split / "*/*")))
            flow_dirs = sorted(Path(flow_dir) / direction / camera for flow_dir in flow_dirs)

            if not image_dirs or not flow_dirs:
                raise FileNotFoundError(
                    "Could not find the FlyingThings3D flow images. "
                    "Please make sure the directory structure is correct."
                )

            for image_dir, flow_dir in zip(image_dirs, flow_dirs):
                images = sorted(glob(str(image_dir / "*.png")))
                flows = sorted(glob(str(flow_dir / "*.pfm")))
                for i in range(len(flows) - 1):
                    if direction == "into_future":
                        self._image_list += [[images[i], images[i + 1]]]
                        self._flow_list += [flows[i]]
                    elif direction == "into_past":
                        self._image_list += [[images[i + 1], images[i]]]
                        self._flow_list += [flows[i + 1]]