Legacy python sql connector pool (no replies)

I have been asked to make changes to a legacy python app which uses Python 2.4, MySQL 1.2.2 and wxpython.
This is built into an installer using py2exe -> nsis.
The original developer cannot be contacted for advice.

There appears to be a missing module preventing me from running or building the app:
missing module ‘pool’.

It is typically used like this:

import pool

db_connection_pool = pool.Pool(lambda:db.open_connection(db=dbtouse))

def open_connection(id="root", password="__rtk__", user_name="",
db=constants.database_name):
instance = MySQLdb.Connect(user=id, passwd=password, db=db)
connection = DBConnection(instance, id, password, user_name)
return connection

It looks like there is a missing SQL connector pool module but I have no idea what it is.
I have tried everything to no avail:

a. processing.Pool or multiprocessing.Pool - TypeError: range() integer end argument expected, got function
b. Pysqlpool – no Pool()
c. SQLAlchemy - 'Pool' object has no attribute 'get'
d. Antiorm - pool = ConnectionPool()
e. SQLRelay – no Pool()
f. Mysql - .connector.pooling
g. psycopg2.pool – no Pool()
h. DBUtils - no Pool()
i. pg_simple - no Pool()
j. asyncpg.pool - no Pool()
k. ctds - no Pool()

Does anyone have any ideas what the missing pool module could be?

Thanks in advance