Consider:
{{{#!python
field_names = [
'first',
'second',
'third',
]
stuff = [(field_name, 'the field name is \"%s\"' % field_name) for
field_name in field_names]
print(stuff)
print('\n\n')
more_stuff = dict(stuff)
for key, value in more_stuff.items():
print(key + ':\t' + value)
}}}
Dan Winslow wrote:
>
> Can someone explain this construct to me?
>
>
>
> errors = [(field_name, '%s is required' % field_name)
>
> for field_name in required_fields
>
> if self._is_empty(ticket[field_name])]
>
>
>
> What does 'errors' contain? I can see that it's a list of some
> sort...but the parenthetical grouping in the first line looks like it
> is some kind of initializer for field_name...so what does it return?
> The contents of field_name? and how does the for loop work...what's
> the difference between the if returning false or true?
>
>
>
> Dan Winslow
> Director of Information Technology, AIM INSTITUTE
> 1905 Harney Street, Suite 700
> Omaha, NE 68102
> 402-345-5025 x156
> [email protected] <mailto:[email protected]>
> www.aiminstitute.org <http://www.aiminstitute.org>
>
>
>
>
> >
--
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
Ariel I Balter, Ph.D.
Postdoc
Biological Monitoring/Modeling
Fundamental and Computational Sciences Directorate
Pacific Northwest National Laboratory
Mail:
PO Box 999, MS P7-58,Richland, WA 99352
Shipping:
790 6th Street, MS P7-58, Richland, WA 99354
Tel: 509-376-7605
Cell: 509-713-0087
[email protected]
www.arielbalter.com
www.pnl.gov
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