A new built-in module irods_query provides a class query_iterator that wraps irods::query C++ iterator class using boost-python.
Thus, query_iterator allows:

• general and specific query from Python rules.
• access to bind args (?) in the SQL for specific query

A supplementary module irods_query_wrapper.py offers the IrodsQuery class, which wraps the boost-python class. It is used in this manner:

def my_rule( rule_args, callback, rei):
  for row in IrodsQuery( rei.rsComm, "select <row_names>  [from <table_names>] where [condition]" , 
                                    query_type = IrodsQuery.[GENERAL|SPECIFIC], [ other options as required... ] ):
      # process each `row' 

Tests still need to be written.