old_contents: #! /usr/bin/env python
  
  import sys
  
  import pybindgen
  from pybindgen import ReturnValue, Parameter, Module, Function, FileCodeSink
  
  def my_module_gen(out_file):
      mod = Module('g')
      mod.add_include('"g.h"')
  
      mod.add_function('GDoA', None, [])
      G = mod.add_cpp_namespace("G")
      G.add_function('GDoB', None, [])
      GInner = G.add_cpp_namespace("GInner")
      GInner.add_function('GDoC', None, [])
  
      mod.generate(FileCodeSink(out_file))
  
  if __name__ == '__main__':
      my_module_gen(sys.stdout)
  
new_contents: #! /usr/bin/env python
  
  import sys
  
  import pybindgen
  from pybindgen import ReturnValue, Parameter, Module, Function, FileCodeSink
  
  def my_module_gen(out_file):
      mod = Module('g')
      mod.add_include('"g.h"')
  
      mod.add_function('GDoA', None, [])
      G = mod.add_cpp_namespace("G")
      G.add_function('GDoB', None, [])
      GInner = G.add_cpp_namespace("GInner")
      GInner.add_function('GDoC', None, [])
  
      G.add_include('<fstream>')
  
      ofstream = G.add_class('ofstream', foreign_cpp_namespace='::std')
      ofstream.add_enum('openmode', [
              ('app', 'std::ios_base::app'),
              ('ate', 'std::ios_base::ate'),
              ('binary', 'std::ios_base::binary'),
              ('in', 'std::ios_base::in'),
              ('out', 'std::ios_base::out'),
              ('trunc', 'std::ios_base::trunc'),
              ])
      ofstream.add_constructor([Parameter.new("const char *", 'filename'),
                                Parameter.new("::std::ofstream::openmode", 'mode', default_value="std::ios_base::out")])
      ofstream.add_method('close', None, [])
  
      mod.generate(FileCodeSink(out_file))
  
  if __name__ == '__main__':
      my_module_gen(sys.stdout)
  
subject: Add wrapping of std::ofstream to the example