A little about modules
Look at the Python tutorial on Modules (up to packages). Create the file fibo.py (as described in the totorial) and go through section 6.3 (except you can skip 6.1.3).
Start up Python, perhaps in idle
or charm and learn about bit more
socket module by trying out the following commands.
import socket dir(socket) socket.MSG_OOB socket.gethostname socket.socket s = socket.socket() dir(s) dir(s.__class__) s.__doc__ s.accept.__doc__ __name__
Open the documentation for
urllib2 which everyone seems to agree is pretty bad, but better than
Restart python and import the
dir operator on
Find a function to open the URL (hint –
urlopen) at page
http://www.cs.unca.edu/networking and use the
dir operator on object representing the opened URL.
It should look a lot like an object for reading a file.
With a single operator read the web page at the URL.
There’s a little bit of redirection here that may disappoint
you. That’s another reason why
urllib2 is unpopular.
You have been advised to use
HTMLParser in Homework 3.
I m assuming you have already tried out the example in Section 19.1.1 . Your assignment for this lab is the modify this example so that it records and prints the level of each start tag. This means the output should be something like the following:
Encountered a start tag: html [level 0] Encountered a start tag: head [level 1] Encountered a start tag: title [level 2] Encountered some data : Test Encountered an end tag : title Encountered an end tag : head Encountered a start tag: body [level 1] Encountered a start tag: h1 [level 2] Encountered some data : Parse me! Encountered an end tag : h1 Encountered an end tag : body Encountered an end tag : html
Java and C++ have similar ways of handling initialization of derived classes. Python is weird. I suggest you take a look at some of the following.