Defining our own types?

[Steve Holden]

Michael Yanowitz wrote:
> Hello:
> 
>    I know this will probably turn about to be another dumb question
> and I know I have asked a few really dumb ones lately on this list,
> but I am hoping otherwise this time:
> 
> suppose I type:
> ip = 123.45.67.89
>   (no quotes)
>     - is it possible (maybe by catching an exception), to have this
> automatically converted to an ip address and maybe have the exception
> convert this into:
>   ip = make_ip_address (123, 45, 67, 89)
> 
>    Or even better, if possible. Can I define my own type
> IP = BYTE + '.' + BYTE + '.' + BYTE + '.' + BYTE
> BYTE = in range(256)
>   and have Python over-ride its rules so that if I type in a number
> followed by a dot followed by number followed by a dot followed by a
> number followed by a dot and another number, it can call
> make_ip_address() on the value?
> 
No, because the interpreter will raise a syntax error rather than 
compiling the code.

regards
  Steve
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