python implementation calls seek on input, unable to read avros from a stream

ack -a -i seek
src/avro/datafile.py
109:      # seek to the end of the file and prepare for writing
110:      writer.seek(0, 2)
190:    DataFileReader.seek(long). Forces the end of the current block,
261:    self.reader.seek(0, 2)
263:    self.reader.seek(remember_pos)
270:    # seek to the beginning of the file to get magic block
271:    self.reader.seek(0, 0) 
316:    return True. Otherwise, seek back to where we started and return False.
320:      self.reader.seek(-SYNC_SIZE, 1)

src/avro/io.py
148:    reader is a Python object on which we can call read, seek, and tell.
267:    self.reader.seek(self.reader.tell() + n)

src/avro/txipc.py
217:    request.content.seek(0, 0)

test/test_io.py
137:    writer.seek(0)