Nothing outside the Python 2.6 standard library
from ftp_to_str import ftp_to_str
job_status = ftp_to_str(host='some.ftp.host', file_path='batch_job.log')
if 'Program was executed successfully' in job_status:
print 'Job status is OK'
exit(0)
else:
print 'Job status is NOT OK'
exit(1)