Generate barcode .png from a .csv data source file

image_barcode_generator.py

import csv
import os
import requests
import shutil
import urllib

"""
Docs: http://labelary.com/service.html
"""
url = 'http://api.labelary.com/v1/printers/8dpmm/labels/3x1.5/0/'

data_source_file = 'data.csv'
output_directory = 'output'

if not os.path.exists(output_directory):
    os.makedirs(output_directory)

with open(data_source_file, 'rb') as csvfile:
    rows = csv.reader(csvfile, delimiter=',')
    for identifier, barcode in rows:
        print 'identifier: {}  -- barcode: {}'.format(identifier, barcode)

        zpl = ''.join(['^XA^BY4,5,200^FO010,10^BC^FD', barcode, '^FS^XZ'])
        files = {'file': zpl}
        response = requests.post(url, files=files, stream=True)

        if response.status_code == 200:
            response.raw.decode_content = True

            filename = ''.join([identifier, '.png'])
            with open(os.path.join(output_directory, filename), 'wb') as out_file:
                shutil.copyfileobj(response.raw, out_file)
        else:
            print('Error: ' + response.text)