SlimG

$ odfuserfield -L test.odt
Name#float:0
$ odfuserfield -s Name:Example test.odt -O output.odf
Traceback (most recent call last):
  File "/usr/local/bin/odfuserfield", line 94, in <module>
    user_fields.update(setfields)
  File "/usr/local/lib/python2.7/dist-packages/odf/userfield.py", line 168, in update
    self.savedoc()
  File "/usr/local/lib/python2.7/dist-packages/odf/userfield.py", line 79, in savedoc
    self.document.save('-')
  File "/usr/local/lib/python2.7/dist-packages/odf/opendocument.py", line 402, in save
    self.__zipwrite(outputfp)
  File "/usr/local/lib/python2.7/dist-packages/odf/opendocument.py", line 424, in __zipwrite
    self._z.writestr(zi, self.mimetype)
  File "/usr/lib/python2.7/zipfile.py", line 1214, in writestr
    zinfo.header_offset = self.fp.tell()    # Start of header bytes
IOError: [Errno 29] Illegal seek