class_docstr: Transaction managers.
class_docstr_tok: ["Transaction","managers","."]
docstr: Returns the number of transactions.
docstr_tok: ["Returns","the","number","of","transactions","."]
code: def num_transaction(self):
      """
      Returns the number of transactions.
      """
      return self.__num_transaction
  
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 5 for calling the TransactionManager obj's underlying member method code with example usage: obj.num_transaction() and returns: self