Count the number of packets with pyshark

Question

In this code with pyshark

import pyshark
cap = pyshark.FileCapture(filename)
i = 0
for idx, packet in enumerate(cap):
    i += 1
print i
print len(cap._packets)

i and len(cap._packets) give two different results. Why is that?

Answer 1

Don't know if it works in Python 2.7, but in Python 3.4 len(cap) returns 0. The FileCapture object is a generator, so what worked for me is len([packet for packet in cap])

Answer 2

i too, len(cap) is 0, i thinks the answer is fail. if you want know len(cap), please load packet before print it. use: cap.load_packets()

cap.load_packets()
packet_amount = len(cap)
print packet_amount