YouTube Batch Download Script

#!/usr/bin/python
import sgmllib
import sys
 
class MyParser(sgmllib.SGMLParser):
    "A simple parser class."
 
    def parse(self, s):
        "Parse the given string 's'."
        self.feed(s)
        self.close()
 
    def __init__(self, verbose=0):
        "Initialise an object, passing 'verbose' to the superclass."
 
        sgmllib.SGMLParser.__init__(self, verbose)
        self.hyperlinks = []
 
    def start_a(self, attributes):
        "Process a hyperlink and its 'attributes'."
 
        for name, value in attributes:
            if name == "href":
		if value.startswith("/watch?v="):
			self.hyperlinks.append("youtube-dl -t http://youtube.com"+value)
 
    def get_hyperlinks(self):
        "Return the list of hyperlinks."
 
        return self.hyperlinks
 
def f2(seq): 
   # order preserving
   checked = []
   for e in seq:
       if e not in checked:
           checked.append(e)
   return checked
 
import urllib, sgmllib
 
# Get something to work with.
f = urllib.urlopen(sys.argv[1])
s = f.read()
 
# Try and process the page.
# The class should have been defined first, remember.
myparser = MyParser()
myparser.parse(s)
 
# Get the hyperlinks.
print f2(myparser.get_hyperlinks())
yt = open("youtube_links","w")
 
for link in f2(myparser.get_hyperlinks()):
	yt.write(link)
	yt.write("\n")
 
print "\nYouTube Batch Download Script \"youtube_links\" has been generated. Execute it !"