debugging

import pdb

def short_ids(short_id_file):
    """This function expects a short_id file and returns a list with all
    short_ids."""
    short_id_list = []
    invalid_ids = []
    with open(short_id_file) as data_file:
        for line in data_file:
            short_id = line.strip('\n')
            if len(short_id) == 10:
                short_id_list.append(line.strip('\n'))
            else:
                invalid_ids.append(short_id)
    print 'Total of IDs in the file: {}.'.format(
        len(short_id_list) + len(invalid_ids))
    pdb.set_trace()
    print 'InvalidIDs: {}'.format(len(invalid_ids))
    print 'Valid IDs to downlaod: {}'.format(len(short_id_list))
    data_file.close()
    short_id_list = short_id_list
    return short_id_list