tuples

Consider if I had a function that took a tuple argument (x,y), where x was in the range(X), and y in the range(Y), the normal way of doing it would be: for x in range(X): for y in range(Y): function(x,y) is there a way to do for xy in something_like_range(X,Y): function(xy) such that xy was a tuple (x,y)? You can use product from itertools >>> from itertools import product >>> >>> for x,y in product(range(3), range(4)): ... print (x,y) ... (0, 0) (0, 1) (0, 2) (0, 3) (1, 0) (1, 1) (1, 2) (1, 3) ... and so on Your code would look like: for x,y in product(range(X), range(Y)): function(x,y) You

What is the best/most efficient way to check if all tuple values? Do I need to iterate over all tuple items and check or is there some even better way? For example: t1 = (1, 2, 'abc') t2 = ('', 2, 3) t3 = (0.0, 3, 5) t4 = (4, 3, None) Checking these tuples, every tuple except t1 , should return True, meaning there is so called empty value. P.S. there is this question: Test if tuple contains only None values with Python , but is it only about None values It's very easy: not all(t1) returns False only if all values in t1 are non-empty/nonzero and not None . all short-circuits, so it only has to

If I have a function def f(a, b, c, d) and two tuples, each with two elements, is there any way to unpack these tuples so that I can send their values to the function? f(*tup1, *tup2) As of the release of Python 3.5.0 , PEP 448 "Additional Unpacking Generalizations" makes the natural syntax for this valid Python: >>> f(*tup1, *tup2) 1 2 2 3 In older versions of Python, you can need to concatenate the tuples together to provide a single expanded argument: >>> tup1 = 1, 2 >>> tup2 = 2, 3 >>> def f(a, b, c, d): print(a, b, c, d) >>> f(*tup1+tup2) 1 2 2 3 Another approach using chain >>> from

Possible Duplicate: Why doesn't ADL find function templates? Calling get does not seem to invoke argument dependent lookup: auto t = std::make_tuple(false, false, true); bool a = get<0>(t); // error bool b = std::get<0>(t); // okay g++ 4.6.0 says: error: 'get' was not declared in this scope Visual Studio 2010 says: error C2065: 'get': undeclared identifier Why? Nawaz It's because you attempt to explicitly instantiate get function template, by providing 0 as template argument. In case of templates, ADL works if a function template with that name is visible at the point of the call. This visible

Until today, my understanding of .NET Tuple classes had been that they delegate their implementation of Equals() to their contents, allowing me to equate and compare them "by value". Then this test came along and made a fool out of me: [TestMethod] public void EquateTwoTuplesWithSameContent() { var t1 = Tuple.Create("S"); var t2 = Tuple.Create((object)t1.Item1); Assert.IsTrue(t1.Equals(t2)); // Boom! } Reading through MSDN documentation and various blogs has left me with more questions. From what I gather, it would seem that Tuple<object> and Tuple<TWhatever> are always considered not equal,