NameError: name 'packet' is not defined #2

import pcapkit

pcapfile='adsb.pcap'

extraction=pcapkit.extract(fin=pcapfile,store=False,nofile=True,tcp=True,strict=True)

NameError: name 'packet' is not defined

the call stack:

File "C:\Users\Root\Anaconda3\lib\site-packages\pcapkit\interface_init_.py", line 128, in extract
trace=trace, trace_fout=trace_fout, trace_format=trace_format)
File "C:\Users\Root\Anaconda3\lib\site-packages\pcapkit\foundation\extraction.py", line 498, in init
self.run() # start extraction
File "C:\Users\Root\Anaconda3\lib\site-packages\pcapkit\foundation\extraction.py", line 256, in run
self.record_frames() # read frames
File "C:\Users\Root\Anaconda3\lib\site-packages\pcapkit\foundation\extraction.py", line 360, in record_frames
self._read_frame()
File "C:\Users\Root\Anaconda3\lib\site-packages\pcapkit\foundation\extraction.py", line 579, in _read_frame
return self._default_read_frame()
File "C:\Users\Root\Anaconda3\lib\site-packages\pcapkit\foundation\extraction.py", line 621, in _default_read_frame
flag, data = ipv4_reassembly(packet)
NameError: name 'packet' is not defined