fetch_test_basic.py

#!/usr/bin/python
# coding: utf-8

import urllib
import urllib2

reg_nos = [16738, 17288, 18162, 18776, 18868, 19116, 19223, 19505];
pdf_url = 'http://www.mapa.es/agricultura/pags/fitos/registro/sustancias/pdf/%s.pdf'

def fetch_url(url): 
    return urllib2.urlopen(url).read() 

def save_url_as_file(url, filename):
    open(filename,'wb').write(fetch_url(url))
    
def download_pdf(reg_no):
    f = '%d.pdf' % reg_no
    save_url_as_file(pdf_url % reg_no, f)
    print "\t- %s downloaded" % f

# tests
def single(regs):
    for u in regs:
        download_pdf(u)

single(reg_nos)