Tkinter or Python issue?

[Ron Provost]

Hello,

I'm using python 2.4.2 on Win XP Pro.  I'm trying to understand a behavior 
I'm seeing in some Tkinter code I have.  I've reduced my question to a small 
piece of code:


#####BEGIN CODE
#################
import Tkinter as Tk
import tkFont

sampleText = """Here is a test string.  This is more text
Here is a second line of text.  How much
more can I type.  I can't think of anything else to type.
"""

root = Tk.Tk( )
t = Tk.Text( root )
t.pack( )

t.insert( Tk.END, sampleText )

t.tag_config( 'AB', font=tkFont.Font( family='ariel', size=24, 
weight=tkFont.BOLD ) )
t.tag_config( 'TBU', font=tkFont.Font( family='times', size=10, 
weight=tkFont.BOLD, underline=1 ) )

t.tag_add( 'AB', '1.8', '1.15' )
t.tag_add( 'TBU', '2.10', '2.30' )

root.mainloop( )
#################
#######END CODE

Now when I run this I expect to see a small bit of the sampleText in ariel 
bold and another bit in times bold underline, instead I see both bits in the 
later style.  Interestingly, if I create the Font objects before calling 
t.tag_config() (i.e. replace the two t.tag_config( ) lines with the 
following):


f1 = font=tkFont.Font( family='ariel', size=24, weight=tkFont.BOLD )
f2 = font=tkFont.Font( family='times', size=10, weight=tkFont.BOLD, 
underline=1 )
t.tag_config( 'AB', font=f1 )
t.tag_config( 'TBU', font=f2 )


In rerunning the code, I see each bit of text now styled differently.  This 
is the behavior that I both expect and want.  Does anybody know why the two 
bits of code result in different behavior?  Is it a Python thing or a 
Tkinter thing?

Thanks for your feedback.

Ron