reader = MARCReader(file(input), to_unicode=True)

Traceback (most recent call last):
  File "convert_bib.py", line 10, in <module>
    reader = MARCReader(file(input), to_unicode=True)
TypeError: __init__() got an unexpected keyword argument 'to_unicode'

class MARCReader(Reader):
<snip>
    def __init__(self, marc_target, to_unicode=True, force_utf8=False,
            hide_utf8_warnings=False, utf8_handling='strict'):
    <snip>