code: def parse_csv(file_path):
      """Parses the csv file and returns number of rows"""
  
      num_rows = 0
      with open(file_path, "r", newline="") as csvfile:
          reader = csv.DictReader(csvfile, delimiter="\t")
          for _ in reader:
              num_rows += 1
  
      return num_rows
  
file_path: ClassyVision/test/hooks_output_csv_hook_test.py
imports: import csv
  import os
  import shutil
  import tempfile
  import torch
  from classy_vision.hooks import OutputCSVHook
  from classy_vision.tasks import build_task
  from classy_vision.trainer import LocalTrainer
  from test.generic.config_utils import get_fast_test_task_config
  from test.generic.hook_test_utils import HookTestBase
label_desc: Use image node_id 1 for calling a global function with example usage: parse_csv(file_path) and returns: num_rows