Bulk-API: How to add a batch with both CSV data and a query?

In SF, we have a field product.serial__c. I have a CSV with a bunch of serial numbers that I would like to pull other fields from, i.e.

SELECT product.name, product.price__c FROM product where product.serial__c IN (serial_csv)

So I'd like to add a batch, filled with this CSV data and run a query with it.

My question is how the add batch API call should be. Here is my function in python

⌗Code thanks to http://www.wadewegner.com/2014/04/update-records-with-python-and-the-salesforce-bulk-api/
def addBatch(instance, session_id, job_id, objects):
	request = u"""<?xml version="1.0" encoding="UTF-8"?>
  					<sObjects xmlns="http://www.force.com/2009/06/asyncapi/dataload">
    				 	""" + objects + """
  					</sObjects>"""
  	⌗encoded_request = request.encode('utf-8')
  	url = "https://" + instance + ".salesforce.com/services/async/32.0/job/" + job_id + "/batch"
  	headers = {"X-SFDC-Session": session_id, "Content-Type": "text/csv; charset=UTF-8"}
  	response = requests.post(url = url, headers = headers, data = request, verify = False)
  	return unicode(response.text)

Currently, I'm placing all my csv data in the objects parameter, i.e.:

csv_data = "0000,0001,0002,0003,0004,...,1111"
response = addBatch(instance, session_id, job_id, csv_data)