tuples

问题 I started learning Python few weeks ago (with no previous knowledge of it nor programming). I want to create a definition which will for given dictionary as an argument return a tuple consisted of two lists - one where there are only keys of dictionary, and the other where there are only values of the given dictionary. Basically the code will look like this: """Iterate over the dictionary named letters, and populate the two lists so that keys contains all the keys of the dictionary, and

问题 These are previously defined. def get_service_code(service): return str(service[0]) service_106_data = filter_routes(bus_stations, "106") #[('106', '1', '1', '43009'), ('106', '1', '2', '43179'), .... ('106', '2', '51', '43009')] service_106 = make_service(service_106_data, "106") # ('106', [['43009', '43179',...'43009']]) print(get_service_code(service_106)) --> should return 106 bus_stations here is a txt file that contain a list of numbers like this 106,1,1,43009 106,1,2,43179 . . . 106,2

问题 I have the following code: string = "ad\23e\4x{\s" data = (string,) When I print the data my string in the tuple has an extra slash for each slash a total of 6 back slashes. How can I avoid the extra back slashes? 回答1: The object data is a tuple. When you print a tuple, Python call repr for each element. If you want to format it another way, you have to do the conversion yourself. >>> s = "ad\23e\4x{\s" >>> d = (s,) >>> print d ('ad\x13e\x04{\\s',) >>> print '(%s,)' % (', '.join('"%s"' % _

问题 I have a list of documents, labeled with their appropriate categories: documents = [(list(corpus.words(fileid)), category) for category in corpus.categories() for fileid in corpus.fileids(category)] which gives me the following list of tuples, where the first element of the tuple is a list of words (tokens of a sentence). For instance: [([u'A', u'pilot', u'investigation', u'of', u'a', u'multidisciplinary', u'quality', u'of', u'life', u'intervention', u'for', u'men', u'with', u'biochemical', u

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I have this table: CODE_DEST | NBR_COLIS | POIDS ----------------------------- a | 6 | 2 b | 7 | 5 c | 1 | 1 a | 5 | 3 a | 3 | 1 b | 4 | 4 g | 2 | 4 I

问题 This question already has answers here : How to convert nested list of lists into a list of tuples in python 3.3? (3 answers) Closed 3 years ago . I want to convert a list of list into list of tuples using Python. But I want to do it without iterating through the nested list as it will increasing execution time of script. Is there any way which can workout for me? Thanks in Advance 回答1: converted_list = [tuple(i) for i in nested_list] 来源： https://stackoverflow.com/questions/40529086/python

问题 I have a class class C { public: C() {} private: int timesTriggered_; std::map<std::string, std::tuple<std::string, int, int, int, int, int>> mapST; std::vector<std::string> sv; }; and some objects of this type: C c1; C c2; C c3; I have a map indexed by strings of class C std::map<std::string, std::list<C>> cMap; I add some objects of class C into a map cMap["1"].push_back(c1); cMap["2"].push_back(c2); cMap["3"].push_back(c3); I need a function that when passed the std::list will return (for

问题 This question already has answers here : Get distinct values from list (5 answers) Closed 2 years ago . I have a List of integer tuple List<Tuple<int, int>> list = new List<Tuple<int, int>>(); list.Add(new Tuple<int, int>(1,12)); list.Add(new Tuple<int, int>(1,2)); list.Add(new Tuple<int, int>(1,18)); list.Add(new Tuple<int, int>(1,12)); I want to remove the redundant value of item2 which is 12 in this case The updated list should also be List>. (same type) but with distinct values.The new

问题 I am preparing for test in haskell and I found a task from last test where was given to generate infinite list lists. generate :: Num n => n -> [[n]] where list is n-tuple, n is from parameter. moreover the lists has to be sorted. For exaple: generate 2 = [[0,0],[0,1],[1,0],[1,1],[0,2],[1,2],[2,0],[2,1],[2,2],[0,3],....] I have to use only basic functions. I know that it surely is simple, but I dont know how to do it and I also can't find it on the internet. I will be really glad for any help

问题 I have to process python list of tuples where each tuple contains header name as below- I want all the tuple will be mapped to respectives header in that tuple. [[(u'Index', u' Broad Market Indices :')], [(u'Index', u'CNX NIFTY'), (u'Current', u'7,950.90'), (u'% Change', u'0.03'), (u'Open', u'7,992.05'), (u'High', u'8,008.25'), (u'Low', u'7,930.65'), (u'Prev. Close', u'7,948.90'), (u'Today', u''), (u'52w High', u'9,119.20'), (u'52w Low', u'7,539.50')], [(u'Index', u'CNX NIFTY JUNIOR'), (u