code: def _write_cvvr(self, f, data):
          '''
          Write compressed "data" variable to the end of the file in a CVVR
          '''
          f.seek(0, 2)
          byte_loc = f.tell()
          cSize = len(data)
          block_size = CDF.CVVR_BASE_SIZE64 + cSize
          section_type = CDF.CVVR_
          rfuA = 0
  
          cvvr1 = bytearray(24)
          cvvr1[0:8] = struct.pack('>q', block_size)
          cvvr1[8:12] = struct.pack('>i', section_type)
          cvvr1[12:16] = struct.pack('>i', rfuA)
          cvvr1[16:24] = struct.pack('>q', cSize)
          f.write(cvvr1)
          f.write(data)
  
          return byte_lof _write_cvvr(self, f, data):
          '''
          Write compressed "data" variable to the end of the file in a CVVR
          '''
          f.seek(0, 2)
          byte_loc = f.tell()
          cSize = len(data)
          block_size = CDF.CVVR_BASE_SIZE64 + cSize
          section_type = CDF.CVVR_
          rfuA = 0
  
          cvvr1 = bytearray(24)
          cvvr1[0:8] = struct.pack('>q', block_size)
          cvvr1[8:12] = struct.pack('>i', section_type)
          cvvr1[12:16] = struct.pack('>i', rfuA)
          cvvr1[16:24] = struct.pack('>q', cSize)
          f.write(cvvr1)
          f.write(data)
  
          return byte_loc
docs: Write compressed "data" variable to the end of the file in a CVVR