使用python scrip将Pcap文件转换为文本

Question

我使用下面的代码将带有给定列的pcap file转换为text file。输出文本文件。代码不给出任何错误，它给出输出，但它给出空的，没有任何数据。你能帮我找出错误吗

from scapy.all import *
data = "Emotet-infection-with-Gootkit.pcap"
a = rdpcap(data)
os.system("tshark  -T fields -e _ws.col.Info -e http -e frame.time -e  "
      "data.data -w Emotet-infection-with-Gootkit.pcap > Emotet-infection-with-Gootkit.txt -c 1000")
os.system("tshark -r Emotet-infection-with-Gootkit.pcap -Y http -w Emotet-infection-with-Gootkit.pcap")
sessions = a.sessions()
i = 1
for session in sessions:
 http_payload = ""