tuples

I have 3 lists, a , b and c Each of this lists contains tuples with 3 numbers. Here is an example input: a = [(1,2,4),(1,7,8),(1,5,4),(3,6,7)] b = [(1,2,5),(1,9,3),(1,0,3),(3,6,8)] c = [(2,6,3),(2,4,9),(2,8,5),(1,2,7)] I'm looking for a way to generate a list that takes elements of those 3 lists if the two firsts items of eachs tuple are equals, and addind the third element. In the data I gave, there is only 1 set of tuple with the 2 first values equals : (1,2,4) , (1,2,5) and (1,2,7) . If I add their third value I have 4+5+7 = 16 , so with those data, I should have [(1,2,16)] in the end. The

I have a list of tuples representing x,y points. I also have a list of values for each of these points. How do I combine them into a list of lists (i.e one entry for each point [x,y,val]) or a list of tuples? Thanks You can't add entries to tuples, since tuples are immutable. But you can create a new list of lists: new = [[x, y, val] for (x, y), val in zip(points, vals)] Tuples are immutable, they can't be modified. Convert it to a list, then convert it back if you want to (list((a, b))). 来源： https://stackoverflow.com/questions/2282300/adding-an-entry-to-a-python-tuple

I have a function named _push which can handle different parameters, including tuples, and is supposed to return the number of pushed elements. For example, _push(5) should push '5' on the stack (the stack of lua ) and return 1 (because one value was pushed), while _push(std::make_tuple(5, "hello")) should push '5' and 'hello' and return 2. I can't simply replace it by _push(5, "hello") because I sometimes use _push(foo()) and I want to allow foo() to return a tuple. Anyway I can't manage to make it work with tuples: template<typename... Args, int N = sizeof...(Args)> int _push(const std:

I want to access a specific element of a tuple in a dictionary of tuples. Let's say that I have a dictionary with a unique key, and a tuple with three values, for each key. I want to write a iterator the prints every third item in a tuple for every element in the dictionary. For example dict = {"abc":(1,2,3), "bcd":(2,3,4), "cde", (3,4,5)} for item in dict: print item[2] But this returns c d e Where am I going wrong? for item in dict: print dict[item][2] Also, you should not name anything after a built-in, so name your dictionary 'd' or something other than 'dict' for item in dict: does the

When I create strongly typed View in Asp.net mvc 2, .net 4.0 with model type Tuple I get error when Tuple have more than 4 items example 1: type of view is Tuple<string, string, string, string> (4-tuple) and everything works fine view: <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/WebUI.Master" Inherits="System.Web.Mvc.ViewPage<Tuple<string, string, string, string>>" %> controller: var tuple = Tuple.Create("a", "b", "c", "d"); return View(tuple); example 2: type of view is Tuple<string, string, string, string, string> (5-tuple) and I have this error: Compiler Error Message: