c++ - Python swig-wrapped vector of vector of doubles appears as Tuple -

-

i have function in c++ returns vector<vector<double> > object. have wrapped python using swig. when call it, unable subsequently modify function's output using resize() or push_back() vector methods.

when try this, error 'tuple' object has no attribute 'resize' or 'push_back'. swig transform vectors tuple objects when interact them in python? if that's case, assume output function in python immutable, problem. can pass object wrapped methods accept vector of vectors of doubles. can't mess using vector methods within python. explanation on why or ideas on work-arounds appreciated.

here swig file reference. stl template lines towards end: 

/* solutioncombiner.i */ %module solutioncombiner %{     /* put header files here or function declarations below */     #include "coord.hpp"     #include "materialdata.hpp"     #include "failurecriterion.hpp"     #include "quadpointdata.hpp"     #include "modelsolution.hpp"     #include "exclusionzone.hpp"     #include "criticallocation.hpp"     #include "failuremode.hpp"     #include "executivefunctions.hpp"      #include <fstream>     #include <iostream>  %} %{     #define swig_file_with_init     std::ostream& new_ofstream(const char* filename){         return *(new std::ofstream(filename));     }      std::istream& new_ifstream(const char* filename){         return *(new std::ifstream(filename));     }      void write(std::ostream* fout, char* outstring){         *fout << outstring;     }      std::ostream *get_cout(){return &std::cout;} %}  %include "std_vector.i" %include "std_string.i" %include "std_set.i" %include "../../source/coord.hpp" %include "../../source/materialdata.hpp" %include "../../source/failurecriterion.hpp" %include "../../source/quadpointdata.hpp" %include "../../source/modelsolution.hpp" %include "../../source/exclusionzone.hpp" %include "../../source/criticallocation.hpp" %include "../../source/failuremode.hpp" %include "../../source/executivefunctions.hpp"  namespace std {    %template(intvector) vector<int>;    %template(doublevector) vector<double>;    %template(doublevvector) vector<vector<double> >;    %template(doublevvvector) vector<vector<vector<double> > >;    %template(solutionvector) vector<modelsolution>;    %template(critlocvector) vector<criticallocation>;    %template(critlocvvector) vector<vector<criticallocation> >;    %template(modevector) vector<failuremode>;    %template(intset) set<int>; } std::ofstream& new_ofstream(char* filename); std::ifstream& new_ifstream(char* filename); std::iostream *get_cout();

yes, vector template returns immutable python tuple. maybe modify std_vector.i implementation return lists, there reason choice. convert them lists can manipulate them in python:

>>> x.func() ((1.5, 2.5, 3.5), (1.5, 2.5, 3.5), (1.5, 2.5, 3.5), (1.5, 2.5, 3.5)) >>> [list(n) n in x.func()] [[1.5, 2.5, 3.5], [1.5, 2.5, 3.5], [1.5, 2.5, 3.5], [1.5, 2.5, 3.5]]

note: made sample function returned vector<vector<double>> test.


Comments

Post a Comment

Popular posts from this blog

jasper reports - Fixed header in Excel using JasperReports -

-
how can create excel report fixed header using japserreports? mean need header fixed when scroll excel file. this possible adding couple properties in jrxml file each report. take @ advanced excel features freeze panes. if wanted freeze after first column header (down left side basically) this: <statictext> <reportelement style="sans_bold" mode="opaque" x="0" y="60" width="104" height="20" forecolor="#ffffff" backcolor="#666666"> <property name="net.sf.jasperreports.export.xls.auto.filter" value="start"/> <property name="net.sf.jasperreports.export.xls.column.width" value="110"/> <property name="net.sf.jasperreports.export.xls.freeze.column.edge" value="left"/> </reportelement> &
Read more

media player - Android: mediaplayer went away with unhandled events -

-
i need duration of audio file series of voice announcements need play app. have added audio files resources , play fine. sample code below works perfect intended purpose: return duration of audio files. here code: float getdurationofaudioresource(locationenum loc, context context){ float duration = 0; try { mediaplayer mp; mp = mediaplayer.create(context, getaudioresource(loc)); duration = mp.getduration(); mp.release(); mp = null; } catch (illegalstateexception e) {e.printstacktrace(); logerror(25, "testdescitem:fault::could not open mediaplayer object audio resource.");} return duration; } here's weird thing. code called in main activity prepares set of audio instructions given test. there no errors within activity. second activity called, long string of errors on logcat. 03-07 13:23:43.820: i/actionlogger(21435): gentest_info_test #0 created. 03-07 13:23:43.830: i/actionlogger(21435): gente
Read more

python - ('The SQL contains 0 parameter markers, but 50 parameters were supplied', 'HY000') or TypeError: 'tuple' object is not callable -

-
import pyodbc,nltk,array cnxn = pyodbc.connect('driver={mysql odbc 5.1 driver};server=127.0.0.1;port=3306;database=information_schema;user=root; password=1234;option=3;') cursor = cnxn.cursor() cursor.execute("use collegedatabase ;") cursor.execute("select * sampledata ; ") cnxn.commit() s=[] j=[] x=[] words = [] w = [] sfq = [] pos=[] entry in cursor: s.append(entry.injury_type),j.append(entry.injury_desc) nltk.tokenize import punktwordtokenizer nltk.corpus import stopwords tokenizer = punktwordtokenizer() english_stops = set(stopwords.words('english')) in range(0,26): # filter stop words tokenizer.tokenize(j[i]) w.append([word word in tokenizer.tokenize(j[i]) if word not in english_stops]) in range(0 , 26):#converting tokenzied text ito string sfq.append(" ".join(w[a])) replacers import regexpreplacer replacer = regexpreplacer() in range (0,26):#pos tagging replacer.repl
Read more