class_docstr: A Database connection.
class_docstr_tok: ["A","Database","connection","."]
docstr: Returns a transaction object. Call ``commit`` or ``rollback``
  on the returned object as appropriate.
docstr_tok: ["Returns","a","transaction","object",".","Call","``","commit","``","or","``","rollback","``","on","the","returned","object","as","appropriate","."]
code: def transaction(self):
      """Returns a transaction object. Call ``commit`` or ``rollback``
      on the returned object as appropriate."""
  
      return self._conn.begin()
  
imports: import os
  from sys import stdout
  from collections import OrderedDict
  from contextlib import contextmanager
  from inspect import isclass
  import tablib
  from docopt import docopt
  from sqlalchemy import create_engine, exc, inspect, text
label_desc: Use image node_id 10 for calling the Connection obj's underlying member method code with example usage: obj.transaction() and returns: self