# -*- coding: UTF-8 -*-
from Tkinter import *
import re

def fn(event):
    print event.__dict__
    #Как здесь определить имя нажатого тега? 

def addTag(tag,start,end):
    txt.tag_add(tag,'1.0+%dc'%start,'1.0+%dc'%end)
    txt.tag_config(tag, background='yellow', foreground='blue')
    txt.tag_bind(tag, '<Double-1>', fn)

tk = Tk()

txt = Text(tk,height=5,width=20,font='Arial 12',wrap=NONE)
txt.pack()
s='''#Line text ##1##
#Line ##text## 2
#Line text ##3##'''
txt.insert(END, s)
text = txt.get(1.0, 'end')
i=0
for mo in re.finditer(r"\#{2}.*?\#{2}", text):
    addTag(i, mo.start(), mo.end())
    i+=1

tk.mainloop()

from Tkinter import *
from random import randint

def randomColor():
    r = randint(1,250)
    g = randint(1,250)
    b = randint(1,250)
    hexchars = "0123456789ABCDEF"
    return "#" + hexchars[r / 16] + hexchars[r % 16] + hexchars[g / 16]\
                + hexchars[g % 16] + hexchars[b / 16] + hexchars[b % 16]


root = Tk()

textw = Text(root,font="Verdana 12 bold")
textw.pack(fill = "both",expand  = 1)

text = u'каждый охотник желает знать где сидит фазан'

for x,word in enumerate(text.split()):
    tagName = 'tag%s'%x
    textw.tag_config(tagName,  foreground = randomColor()) 
    textw.tag_bind(tagName, "<Button-1>",lambda e,tagName=tagName:
                    textw.tag_config(tagName,  foreground = randomColor()) )   
    textw.tag_lower(tagName)     
    textw.insert(END,word+' ',tagName)
root.mainloop()