Translating python dictionary to C++

A dictionary would be a std::map in c++, and a tuple with two elements would be a std::pair.

The python code provided would translate to:

#include <iostream>
#include <map>

typedef std::map<std::pair<int, int>, int> Dict;
typedef Dict::const_iterator It;

int main()
{
   Dict d;

   d[std::make_pair(0, 0)] = 0;
   d[std::make_pair(1, 2)] = 1;
   d[std::make_pair(2, 1)] = 2;
   d[std::make_pair(2, 3)] = 3;
   d[std::make_pair(3, 2)] = 4;

   for (It it(d.begin()); it != d.end(); ++it)
   {
      int i(it->first.first);
      int j(it->first.second);
      std::cout <<it->second <<' '
                <<d[std::make_pair(j, i)] <<'\n';
   }
}

The type is

std::map< std::pair<int,int>, int>

The code to add entries to map is like here:

typedef  std::map< std::pair<int,int>, int> container;

container m;

m[ make_pair(1,2) ] = 3; //...

for(container::iterator i = m.begin();  i != m.end(); ++i){
   std::cout << i.second << ' '; 
   // not really sure how to translate [i,j] [j,i] idiom here easily
}

Have a look at Boost.python. It's for interaction between python and C++ (basically building python libs using C++, but also for embedding python in C++ programs). Most pythons data structures and their C++ equivalents are described (didn't checked for the one you want).

std::map or more likely std::tr1::unordered_map / boost::unordered_map (aka hash_map) is what you want.

Also, as kriss said, Boost.Python is a good idea to look at here. It provides a C++ version of python's dict class already, so if you're doing cross-language stuff, it might be useful.

Translating python dictionary to C++

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