Beginner Question - Very Easy I'm Sure...

[Todd_Calhoun]

I'm trying to generate a random number, and then concetate it to a word to 
create a password.

I get the number and assign it to a variable:

+++++++++++++++++++++++++++++
word = "dog"

import random
rannum = random.randrange(100,999)

str(rannum)

word + rannum
+++++++++++++++++++++++++++++

But when I try to concetate the two, I get an error saying:

++++++++++++++++++++++++++++
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in -toplevel-
    list[1] + rannum
TypeError: unsubscriptable object
++++++++++++++++++++++++++++

Any suggestions?