[Tutor] Alan G Week 10 warmup assignment help

[Albert-Jan Roskam]

> To: tutor at python.org
> From: alan.gauld at btinternet.com
> Date: Sat, 2 Apr 2016 09:08:04 +0100
> Subject: Re: [Tutor] Alan G Week 10 warmup assignment help
> 
> On 02/04/16 02:21, Daniella Sapozhnikova wrote:
> > I changed the file to this:
> 
> > DATA = {2: 7493945,
> >         76: 4654320,
> ...
> >         153: 12074784,
> >         8: 4337229}
> > 
> > def iter_dict_funky_sum(data=DATA):
> >     funky = 0
> >     for key, value in data.iteritems():
> >         funky += value - key
> >     return funky
> > 
> > 
> > however now pylint is returning:
> > task_07.py:36: [W0102(dangerous-default-value), iter_dict_funky_sum]
> > Dangerous default value DATA (__builtin__.dict) as argument
> > 
> > how can I pass the dictionary into the function, since pylint considers the
> > wway I'm doing it to be wrong?
> > 
> 
> I would drop the default value for the parameter.
> ( I suspect that Python doesn't like DATA as a default value
> because it means you cant use the function anywhere DATA is
> not defined. But I'm not sure about that)

I thought this warning was about the use of mutable  default arguments and its counterintuitive behavior: https://pythonconquerstheuniverse.wordpress.com/2012/02/15/mutable-default-arguments/