code: def main():
      current_step = 0
      tuple_list = []
      for line in sys.stdin:
          line = line.strip()
          if is_valid(line, args.valid_expr):
              ret = extract(line, args.extract_expr)
              if ret:
                  tuple_list.append(ret)
      action(tuple_list, args.reduction_expr)
  
file_path: PaddleSeg/test_tipc/extract_loss.py
imports: import sys
  import argparse
  import re
label_desc: Use image node_id 6 for calling a global function with example usage: main() without return types