Need max values in list of tuples, based on position

[Thomas Passin]

On 11/11/2022 2:22 PM, Pancho via Python-list wrote:
> On 11/11/2022 18:53, DFS wrote:
>> On 11/11/2022 12:49 PM, Dennis Lee Bieber wrote:
>>> On Fri, 11 Nov 2022 02:22:34 -0500, DFS <nospam at dfs.com> declaimed the
>>> following:
>>>
>>>>
>>>> [(0,11), (1,1),  (2,1),
>>>>   (0,1) , (1,41), (2,2),
>>>>   (0,9) , (1,3),  (2,12)]
>>>>
>>>> The set of values in elements[0] is {0,1,2}
>>>>
>>>> I want the set of max values in elements[1]: {11,41,12}
>>>
>>>     Do they have to be IN THAT ORDER?
>>
>> Yes.
>>
> Sets aren't ordered, which is why I gave my answer as a list. A wrongly 
> ordered list, but I thought it rude to point out my own error, as no one 
> else had. :-)
> 
> Assuming you want numeric order of element[0], rather than first 
> occurrence order of the element[0] in the original tuple list. In this 
> example, they are both the same.
> 
> Here is a corrected version
> 
> from collections import OrderedDict
> def build_max_dict( tups):
>      dict =  OrderedDict()
>      for (a,b) in tups:
>          if (a in dict):
>              if (b>dict[a]):
>                  dict[a]=b
>          else:
>              dict[a]=b
>      return(dict.values())
> 
> This solution giving the answer as type odict_values. I'm not quite sure 
> what this type is, but it seems to be a sequence/iterable/enumerable 
> type, whatever the word is in Python.
> 
> Caveat: I know very little about Python.

Kindly do not use "dict" as a variable name, since that shadows the 
system's built-in name for a dictionary type.