more python build issues

[Graham Percival]

When building from scratch, and after doing the
  make -C python
trick, I end up with this build failure:

/usr/bin/python ../../../scripts/musicxml2ly.py -o
out/00a-Basics-Pitches.ly 00a-Basics-Pitches.xml
Traceback (most recent call last):
  File "../../../scripts/musicxml2ly.py", line 1907, in ?
    main()
  File "../../../scripts/musicxml2ly.py", line 1902, in main
    voices = convert (filename, options)
  File "../../../scripts/musicxml2ly.py", line 1819, in convert
    progress ("Reading MusicXML from %s ..." % filename)
  File "../../../scripts/musicxml2ly.py", line 28, in progress
    stderr_write (str + '\n')
NameError: global name 'stderr_write' is not defined
make[3]: *** [out/00a-Basics-Pitches.ly] Error 1


Is this a new python 2.5 feature?

Cheers,
- Graham