[Tutor] Accessing a tuple of a dictionary's value

[Alan Gauld]

On 22/08/18 17:27, Mats Wichmann wrote:

> I'm really unfond of accessing members of a collection by numeric index.
> 
>   >>> numer, denom = d["twothirds"]
>   >>> print(numer, denom)
>   (2, 3)
> 
> I think that's nicer than:  numer = d["twothirds][0]

You can alsao avoid indexes with the namedtuple
class in the collections module:

>>> import collections as coll
>>> frac = coll.namedtuple("Fraction", ['num','den'])
>>> frac
<class '__main__.Fraction'>
>>> f = frac(2,3)
>>> f.num
2
>>> f.den
3
>>> fracs = {0.67:f}
>>> fracs[0.67].num
2
>>>

Or just use a nested dictionary:

fracs = {0.67, {'num':2, 'den':3}}

print( fracs[0.67]['num'] )

But you have the inconvenience of quoting the
field names.

-- 
Alan G
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