phone number, to letters conversion

[theprask]

I have a couple of questions about this code.
First, this block:

class klass:
    "docstring"
    def_int-self:
       self.attribute="var"
       if len (self.attribute)<2:
           pass

raises a SyntaxError on my machine for "invalid syntax" at 'def_int-self:'

Next, I don't see where the class 'klass' is used anywhere in the script at all, so I'm confused as to why it is there to begin with.

If I comment out that block of code, the program runs, but not as stated. Here is the output I get when I run it:

Output:
 % phonecon.py

     This program will return all the letter conbinations
          that are available on the modern phone
 You just type in a seven digit number and let the program display
    all the letter conbinations that make up that number    Enjoy

            Enter (0) to exit out of the program

Enter a 7 digit phone number (NO spaces)>>   4487125

Enter numbers only no letters or special characters

            Enter (0) to exit out of the program

Enter a 7 digit phone number (NO spaces)>>   0

Enter numbers only no letters or special characters

            Enter (0) to exit out of the program

Enter a 7 digit phone number (NO spaces)>> 

and that is it. It does not show me any letter combinations and 0 does not exit the program. I have to do a 'ps -e |grep python' to get a process id on the script then 'kill <pid>', because 'Ctrl-c' doesn't work to terminate it either.

I haven't yet looked too closely at the rest of the code. When I do, I will get back to you about anything I notice that might help.