Master commit of OpenFace.

lib/3rdParty/dlib/include/dlib/python/boost_python_utils.h

@@ -0,0 +1,83 @@
+// Copyright (C) 2013  Davis E. King (davis@dlib.net)
+// License: Boost Software License   See LICENSE.txt for the full license.
+#ifndef DLIB_BOOST_PYTHON_UtILS_Hh_
+#define DLIB_BOOST_PYTHON_UtILS_Hh_
+
+#include <boost/python.hpp>
+#include <vector>
+#include <string>
+#include <dlib/serialize.h>
+
+inline bool hasattr(
+    boost::python::object obj, 
+    const std::string& attr_name
+) 
+/*!
+    ensures
+        - if (obj has an attribute named attr_name) then
+            - returns true
+        - else
+            - returns false
+!*/
+{
+     return PyObject_HasAttrString(obj.ptr(), attr_name.c_str());
+}
+
+// ----------------------------------------------------------------------------------------
+
+template <typename T>
+std::vector<T> python_list_to_vector (
+    const boost::python::object& obj
+)
+/*!
+    ensures
+        - converts a python object into a std::vector<T> and returns it.
+!*/
+{
+    std::vector<T> vect(len(obj));
+    for (unsigned long i = 0; i < vect.size(); ++i)
+    {
+        vect[i] = boost::python::extract<T>(obj[i]);
+    }
+    return vect;
+}
+
+template <typename T>
+boost::python::list vector_to_python_list (
+    const std::vector<T>& vect
+)
+/*!
+    ensures
+        - converts a std::vector<T> into a python list object.
+!*/
+{
+    boost::python::list obj;
+    for (unsigned long i = 0; i < vect.size(); ++i)
+        obj.append(vect[i]);
+    return obj;
+}
+
+// ----------------------------------------------------------------------------------------
+
+template <typename T>
+boost::shared_ptr<T> load_object_from_file (
+    const std::string& filename
+)
+/*!
+    ensures
+        - deserializes an object of type T from the given file and returns it.
+!*/
+{
+    std::ifstream fin(filename.c_str(), std::ios::binary);
+    if (!fin)
+        throw dlib::error("Unable to open " + filename);
+    boost::shared_ptr<T> obj(new T());
+    deserialize(*obj, fin);
+    return obj;
+}
+
+// ----------------------------------------------------------------------------------------
+
+
+#endif // DLIB_BOOST_PYTHON_UtILS_Hh_
+