self.functions = {}
 
-        for child in element.getchildren():
+        for child in element:
             if child.tag == "size":
                 n = child.get( "name" )
                 c = child.get( "count" )
                     self.counter_list.append(param.counter)
 
 
-        for child in element.getchildren():
+        for child in element:
             if child.tag == "glx":
                 rop = child.get( 'rop' )
                 sop = child.get( 'sop' )
 
 
         parameters = []
         return_type = "void"
-        for child in element.getchildren():
+        for child in element:
             if child.tag == "return":
                 return_type = child.get( "type", "void" )
             elif child.tag == "param":
                 if param.is_image():
                     self.images.append( param )
 
-        if element.getchildren():
+        if list(element):
             self.initialized = 1
             self.entry_point_parameters[name] = parameters
         else:
 
 
     def process_OpenGLAPI(self, file_name, element):
-        for child in element.getchildren():
+        for child in element:
             if child.tag == "category":
                 self.process_category( child )
             elif child.tag == "OpenGLAPI":
         [cat_type, key] = classify_category(cat_name, cat_number)
         self.categories[cat_type][key] = [cat_name, cat_number]
 
-        for child in cat.getchildren():
+        for child in cat:
             if child.tag == "function":
                 func_name = real_function_name( child )