How to use the importlab.environment.Environment function in importlab

def setUp(self):
        self.tempdir = utils.Tempdir()
        self.tempdir.setup()
        self.filenames = [
            self.tempdir.create_file(f, FILES[f])
            for f in FILES]
        self.fs = fs.OSFileSystem(self.tempdir.path)
        self.env = environment.Environment(fs.Path([self.fs]), (3, 6))

def setUp(self):
        self.tempdir = utils.Tempdir()
        self.tempdir.setup()
        filenames = [
            self.tempdir.create_file(f, FILES[f])
            for f in FILES]
        self.fs = fs.OSFileSystem(self.tempdir.path)
        env = environment.Environment(fs.Path([self.fs]), (3, 6))
        self.graph = graph.ImportGraph.create(env, filenames)

def setUp(self):
        self.tempdir = utils.Tempdir()
        self.tempdir.setup()
        self.filenames = [
            self.tempdir.create_file(f, FILES[f])
            for f in FILES]
        self.fs = fs.OSFileSystem(self.tempdir.path)
        self.env = environment.Environment(fs.Path([self.fs]), (3, 6))

def create_from_args(args):
    python_version_string = args.python_version
    python_version = utils.split_version(python_version_string)
    path = path_from_pythonpath(args.pythonpath)
    return Environment(path, python_version)