a few helpful libraries are: urllib, htmllib, urllib2, cookielib

You could probably use GetInsertionPoint, along with GetRange, eg
line_number = len( self.editor.GetRange( 0, self.editor.GetInsertionPoint() ).split("\n") )

Sorry, i've solved it on my own. In the tkinter text widget, tags are used for formatting:
Text.add_tag(name='myTag',start=1.0,stop=END,font='ariel 20')

Thanks anyway! :cheesy: :mrgreen:

For the Tkinter Text widget, is there a way to assign the selected text to a new tag?(other than 'sel',which changes)

There is a cheater way. You need to (this is very important):

cd into your idlelib directory
run: python PyShell.py

It raises an error if you havnt cd-d into idlelib