code: def __call__(self, uri: str) -> hip.Experiment:
      PREFIX = "w2l://"
      if not uri.startswith(PREFIX):
          raise hip.ExperimentFetcherDoesntApply()
      uri = uri[len(PREFIX) :]
      perfs = list(glob.glob(str(Path(uri) / "*_perf")))
      perfs.sort()
  
      prev_ckpt_name: tp.Optional[str] = None
      xp = hip.Experiment()
      for p in perfs:
          mtrics = self._parse_metrics(Path(p))
          for m in mtrics:
              ckpt_name = uri[-5:] + "_" + str(len(xp.datapoints))
              xp.datapoints.append(
                  hip.Datapoint(
                      uid=ckpt_name, from_uid=prev_ckpt_name, values=m
                  )
              )
              prev_ckpt_name = ckpt_name
      return xp
  
imports: import csv
  import random
  import uuid
  import json
  import math
  import re
  import ast
  import glob
  import os
  import importlib
  import importlib.util
  import typing
  from pathlib import Path
  from .None import experiment
  from .fetchers_demo import README_DEMOS
label_desc: Use image node_id 2 for calling the Wav2letterLoader obj's underlying member method code with example usage: obj.__call__(uri) and returns: xp