[C++-sig] Boost Python Tuple - Find length of tuple?

[Simon Pickles]

Hello,

I have a simple question. How do I find out in c++ how many elements are 
contained within a boost::python::tuple?

I tried this:

       using namespace boost::python;
       tuple a = make_tuple("hello", 42);
       object b = a.attr("length"); // exception
       unsigned int c = extract<unsigned int>(b);
       assert( c==2 );

AttributeError: 'tuple' object has no attribute 'length'

Am I missing something?

Thanks

Si
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