error message with bioc_reader.py

[proline827]

File "C:\Python27\test_read+write.py", line 24, in
main()
File "C:\Python27\test_read+write.py", line 10, in main
bioc_reader = BioCReader(test_file, dtd_valid_file=dtd_file)
TypeError: init() got an unexpected keyword argument 'dtd_valid_file'