import json

def read_json_file(file_name):
  # Read the JSONL file
  with open(file_name) as f:
    for line in f:
      txn = json.loads(line)
      # Yield valid transactions only
      if (txn['orderID'] != ""):
        yield(txn)

txn_generator = read_json_file('retail_transactions.jsonl')