C-a move cursor to beginning of line
C-b move back one character
C-d delete a character
C-e move cursor to end of line
C-f move forward one character
C-k delete the line
C-n move cursor to next line
C-p move cursor to previous line
C-v page down
C-x u undelete
C-x C-c exit
C-x C-f find a file
C-x C-s save file
C-x C-v find alternative file
C-x C-w write to a file with new filename
ESC b back one word
ESC d delete word
ESC f move cursor by one word
ESC < move to beginning of file
ESC > move to end of file
ESC v page up

Note: C = The Control key

>> sudo add-apt-repository ppa:dr3mro/nautilus-actions-extra
>> sudo apt-get update && sudo apt-get install nautilus-actions-extra

mypythonnotes
docs python it

Iterator responds to next() and raises a StopIteration exception when there are no more elements

Generator is a function which returns an iterator: to implement a generator simply use the yield keyword to successively return values to the calling context and raise a StopIteration when done

import re
import os
import base64
import urllib.request

baseUrl = "http://cazzola.dico.unimi.it/"
username = ""
password = ""

if __name__ == "__main__":
    fd = open('page.html')

    opener = urllib.request.build_opener()
    base64string = base64.encodestring(bytes('{0}:{1}'.format(username, password), "utf-8"))[:-1]
    opener.addheaders = [('Authorization', "Basic {0}".format(base64string.decode()))]

    for line in fd.readlines():
        paths = re.findall("[a-zA-Z0-9/\-%\(\).&;]+pdf", line)

        if (len(paths) > 0):
            url = paths[0].replace("&", "&")
            fl = opener.open(baseUrl + url)
            name = url.split("/")[-1].replace("%20", " ")

            pdf = open("output" + os.sep + name, "wb")
            pdf.writelines(fl.readlines())
            pdf.close()

            print("downloaded ... " + name)

Nota: username e password devono essere richiesti direttamente a lui

tornado web server
interactive python

Provate la modalità notebook di ipython … personalmente mi fà sbavare!!
Che fico