Index: Python-2.5.1/Lib/distutils/command/build_ext.py =================================================================== --- Python-2.5.1.orig/Lib/distutils/command/build_ext.py +++ Python-2.5.1/Lib/distutils/command/build_ext.py @@ -513,7 +513,7 @@ class build_ext (Command): target_lang=language) - def swig_sources (self, sources, extension): + def swig_sources (self, sources, extension=None): """Walk the list of source files in 'sources', looking for SWIG interface (.i) files. Run SWIG on all that are found, and