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Is there an idiom for this?

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  Is there an idiom for this? KP <kai.peters@gmail.com> - 2015-12-24 14:11 -0800
    Re: Is there an idiom for this? Paul Rubin <no.email@nospam.invalid> - 2015-12-24 14:15 -0800
      Re: Is there an idiom for this? KP <kai.peters@gmail.com> - 2015-12-24 14:32 -0800
    Re: Is there an idiom for this? Quivis <quivis@domain.invalid> - 2015-12-28 19:10 +0000

#100835 — Is there an idiom for this?

Given: 

cfg =  {'c': ('3840', '1024'), 
       'p1': {'gpio': '1', 'id': '4', 'coord': ('0', '0', '1280', '1024')}, 
       'p2': {'gpio': '2', 'id': '5', 'coord': ('1280', '0', '2560', '1024')}, 
       'p3': {'gpio': '3', 'id': '6', 'coord': ('2560', '0', '3840', '1024')}} 

for config in cfg: 
    if config != 'c': 
        print config 

Is there an idiom that combines the 'for...' & the 'if..' lines into one? 

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#100837

KP <kai.peters@gmail.com> writes:
> for config in cfg: 
>     if config != 'c': 
>         print config 
>
> Is there an idiom that combines the 'for...' & the 'if..' lines into one? 

Maybe you actually want

  print [config for config in cfg if config != 'c']

That prints all the relevant keys as a list, rather than one per line.

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#100840

Thanks Paul, you just pointed out one of my blonder moments: 

I actually want all nested dicts one by one, but not the one with the 'c' key...



On Thursday, 24 December 2015 14:15:45 UTC-8, Paul Rubin  wrote:
> KP writes:
> > for config in cfg: 
> >     if config != 'c': 
> >         print config 
> >
> > Is there an idiom that combines the 'for...' & the 'if..' lines into one? 
> 
> Maybe you actually want
> 
>   print [config for config in cfg if config != 'c']
> 
> That prints all the relevant keys as a list, rather than one per line.

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#100936

On Thu, 24 Dec 2015 14:11:49 -0800, KP wrote:

> cfg =  {'c': ('3840', '1024'),
>        'p1': {'gpio': '1', 'id': '4', 'coord': ('0', '0', '1280',
>        '1024')}, 'p2': {'gpio': '2', 'id': '5', 'coord': ('1280', '0',
>        '2560', '1024')},
>        'p3': {'gpio': '3', 'id': '6', 'coord': ('2560', '0', '3840',
>        '1024')}}
> 
> for config in cfg:
>     if config != 'c':
>         print config


del cfg['c']
for config in cfg: print config

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