tuples

问题 Consider this int foo (int a, char c, bool b) {std::cout << a << ' ' << c << ' ' << b << '\n'; return 8;} double bar (int a, char c, bool b, int d) {std::cout << a << ' ' << c << ' ' << b << ' ' << d << '\n'; return 2.5;} char baz (bool a, bool b) {std::cout << a << ' ' << b << '\n'; return 'a';} int main() { const auto tuple = std::make_tuple(5, true, 'a', 3.5, false, 1000, 't', 2, true, 5.8); const std::tuple<int, double, char> t = searchArguments (tuple, foo, bar, baz); } So the arguments

问题 I have a function in python that does error checking on a string. If the function finds an error it will return a tuple with an error code and an identifier for that error. Later in the program I have the function that handles the error. It accepts the tuple into two variables. errCode, i = check_string(s,pathType) check_string is the function that produces the tuple. What I want it to does is return just zero if there is no error. When a zero is returned the above code seems to fail because

问题 I am trying to pass the tuple of the the checked strings in one panel to the textCtrl widget in another panel. I thought that if I polled the panel class containing the checklistbox widget for the checked boxes and set that equal to an attribute of the panel class containing the TextCtrl widget I could do things in the TextCtrl widget based on the boxes that are checked I also tried using pubsub but I was having difficulty and wasn't sure if this was the case that you would use it or not. As

问题 So this is the second piece of a problem with my program, but a completely different issue, thanks to the helpful person who suggested JSON as a better method to do what I wanted.... Anyway... some success with JSON. The program also changed theme, I definitely am not tying to make a game, just get the inspiration to learn more about the concept of "saving" in python.. so here's my code so far, with a valid JSON coded file to read from.. but I ran into another snag, it reports this error when

问题 Maybe this has been asked already, but I can't find it, and I need help. I have a list of tuple pairs: mylist = [('name1', 'name2'), ('name3', 'name4'), ('name5','name6')] The list is generated from a MySQL database and can be of any length. It is possible that some of the names are the same. It is not absolutely necessary that the data type be a list of tuples. That's just what made the most sense to me. It can be a list of lists, tuple of tuples, etc. A dictionary doesn't make sense to me,

问题 I am scratching my head over the following problem. I want to create a dictionary, which uses multiple keys. I came along the solutions suggesting tuples as the method of choice. I think this i a good way to go. However my problem has the following speciality. I would like to make the keys "permutable" (Sorry, if I am using the wrong slang here). What I mean with this, is the following. I want the result of dict[<key1,key2> to be the same as with dict[<key2,<key1>] , because the data that I

问题 I'm experimenting with currying/tupled as an alternative means to pass parameters to a function. In this journey, I'm facing some type difficulties. I'd like to use implicit conversions to transform a tuple of parameters to the target type. This is what I expect: Given (REPL example): case class Cont(value:String) // a simplified container class val paramTuple = (Cont("One"),Cont("2")) def operate(s:String, i:Int): String = s+i // my target operation implicit def contToString(c:Cont): String

问题 I have a list of tuple: [('Lebron James', datetime.date(2017, 12, 23), 500), ('Julie Peralta', datetime.date(2017, 12, 13), 1500), ('Reynaldo Pahay', datetime.date(2017, 12, 11), 2500)] I want to convert it into a list of dictionary: [{'Name': 'Lebron James', 'date': datetime.date(2017, 12, 23), 'penalty': 500}, {'Name': 'Julie Peralta', 'date': datetime.date(2017, 12, 13), 'penalty': 1500}, {'Name': 'Reynaldo Pahay', 'date': datetime.date(2017, 12, 11), 'penalty': 2500}] What's the best and

问题 This question already has answers here : How do you split a list into evenly sized chunks? (61 answers) Closed 6 years ago . I have a list of numbers, how can I group every n numbers into a tuple? For example, if I have a list a = range(10) and I want to group every 5 items into a tuple, so: b = [(0,1,2,3,4),(5,6,7,8,9)] How can I do this? I also want to raise an error if len(a) is not an integer multiple of n . 回答1: >>> a [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> [tuple(a[i:i+5]) for i in range(0,

问题 I got a error saying: unsupported operand type(s) for -: 'int' and 'tuple' How do I correct it? from scipy import integrate cpbar = lambda T: (3.826 - (3.979e-3)*T + 24.558e-6*T**2 - 22.733e-9*T**3 + 6.963e-12*T**4)*8.314 deltahbarCH4 = integrate.quad(cpbar,298,1000) var = deltahbarCH4 hRPbar = hRPbar + (deltahbarCO2 + 2*deltahbarH2O - var -2*deltahbarO2) 回答1: integrate.quad() returns a tuple; deltahbarCO2 + 2*deltahbarH2O is an integer, you are trying to subtract the var tuple. If you wanted