Generating a list of None

[Bengt Richter]

On 14 Jul 2005 19:25:41 -0700, "Nicolas Couture" <nicolas.couture at gmail.com> wrote:

>Hi,
>
>Is it possible to generate a list of `None' ?
>
>opts.__dict__.values() below could be represented by [None, None, None]
>
>---
>def get_options(opts):
>    """Return True or False if an option is set or not"""
>    vals = opts.__dict__.values()
>
>    for val in vals:
>        if val is not None:
>            return True
>
>    return False
>---
>
>This is how I'd like to see it:
>
>---
>def get_options(opts):
>    """Return True or False if an option is set or not"""
>    vals = opts.__dict__.values()
>
>    for if vals is [None * len(vals)]:
>        return False
>
>    return True
>---

how about (untested)

 def get_options(opts):
     """Return True or False if an option is set or not"""
     return [1 for val in vars(opts).values() if val is not None] and True or False

Regards,
Bengt Richter