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+// Copyright Ankit Daftery 2011-2012.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+/**
+ * @brief An example to show how to create ndarrays with built-in python data types, and extract
+ * the types and values of member variables
+ *
+ * @todo Add an example to show type conversion.
+ * Add an example to show use of user-defined types
+ *
+ */
+
+#include <boost/python/numpy.hpp>
+#include <iostream>
+
+namespace p = boost::python;
+namespace np = boost::python::numpy;
+
+int main(int argc, char **argv)
+{
+ // Initialize the Python runtime.
+ Py_Initialize();
+ // Initialize NumPy
+ np::initialize();
+ // Create a 3x3 shape...
+ p::tuple shape = p::make_tuple(3, 3);
+ // ...as well as a type for C++ double
+ np::dtype dtype = np::dtype::get_builtin<double>();
+ // Construct an array with the above shape and type
+ np::ndarray a = np::zeros(shape, dtype);
+ // Print the array
+ std::cout << "Original array:\n" << p::extract<char const *>(p::str(a)) << std::endl;
+ // Print the datatype of the elements
+ std::cout << "Datatype is:\n" << p::extract<char const *>(p::str(a.get_dtype())) << std::endl ;
+ // Using user defined dtypes to create dtype and an array of the custom dtype
+ // First create a tuple with a variable name and its dtype, double, to create a custom dtype
+ p::tuple for_custom_dtype = p::make_tuple("ha",dtype) ;
+ // The list needs to be created, because the constructor to create the custom dtype
+ // takes a list of (variable,variable_type) as an argument
+ p::list list_for_dtype ;
+ list_for_dtype.append(for_custom_dtype) ;
+ // Create the custom dtype
+ np::dtype custom_dtype = np::dtype(list_for_dtype) ;
+ // Create an ndarray with the custom dtype
+ np::ndarray new_array = np::zeros(shape,custom_dtype);
+
+}