code: def load_transactions(input_file, **kwargs):
      """
      Load transactions and returns a generator for transactions.
  
      Arguments:
          input_file -- An input file.
  
      Keyword arguments:
          delimiter -- The delimiter of the transaction.
      """
      delimiter = kwargs.get("delimiter", "\t")
      for transaction in csv.reader(input_file, delimiter=delimiter):
          yield transaction if transaction else [""]
  
imports: import sys
  import csv
  import argparse
  import json
  import os
  from collections import namedtuple
  from itertools import combinations
  from itertools import chain
label_desc: Use image node_id 7 for calling a global function with example usage: load_transactions(input_file) without return types