script para download do livro Digital Signal Processing, disponível gratuitamente em http://www.dspguide.com/pdfbook.htm

gistfile1.py

import urllib2

caps = range(1, 35)

url_template = 'http://www.dspguide.com/CH%d.PDF'
file_template = 'ch%d.pdf'

for cap in caps:

    pdf = urllib2.urlopen(url_template % cap)
    f = open(file_template % cap, 'w')

    for line in pdf.readlines():

        f.write(line)

    f.close()
    pdf.close()