[Python] Pyshark统计pcap的packet协议字段并柱状图可视化

import pyshark
import collections
import matplotlib.pyplot as plt
import numpy as np

cap = pyshark.FileCapture('pcap/netatmoweatherPOWER_3.pcap', only_summaries=True)
protocolList = []
for packet in cap:
    line = str(packet)
    formattedLine = line.split(" ")
    protocolList.append(formattedLine[4])
counter = collections.Counter(protocolList)

plt.style.use('ggplot')
y_pos = np.arange(len(list(counter.keys())))
plt.bar(y_pos, list(counter.values()), align='center', alpha=0.5, color=['b', 'g', 'r', 'c', 'm'])
plt.xticks(y_pos, list(counter.keys()))
plt.ylabel("Frequency")
plt.xlabel("Protocol Name")
plt.savefig("ProtocolGraph.png")

报的这个错 

Task was destroyed but it is pending!
task: >
C:UsersRyananaconda3libasynciobase_events.py:641: RuntimeWarning: coroutine 'Capture.close_async' was never awaited

更改后的代码如下

import asyncio
import pyshark
import collections
import matplotlib.pyplot as plt
import numpy as np

loop = asyncio.ProactorEventLoop()
asyncio.set_event_loop(loop)
cap = pyshark.FileCapture('pcap/netatmoweatherPOWER_3.pcap', only_summaries=True, eventloop=loop)
protocolList = []
for packet in cap:
    line = str(packet)
    formattedLine = line.split(" ")
    protocolList.append(formattedLine[4])
counter = collections.Counter(protocolList)

plt.style.use('ggplot')
y_pos = np.arange(len(list(counter.keys())))
plt.bar(y_pos, list(counter.values()), align='center', alpha=0.5, color=['b', 'g', 'r', 'c', 'm'])
plt.xticks(y_pos, list(counter.keys()))
plt.ylabel("Frequency")
plt.xlabel("Protocol Name")
plt.savefig("ProtocolGraph.png")

PyShark - Create Protocol Graph - YouTube

Exception: got Future attached to a different loop · Issue #467 · KimiNewt/pyshark (github.com)