[Python] 'haslayer' function not working in scapy-python

I'm trying to write a simple code that detect IP source address for ICMP packet in scapy, the problem is haslayer function looks not returning anything.

from scapy.all import *

while 1:

pkt = sniff ( iface="eth0" , count = 1 )
pkt.summary()

try:
if pkt.haslayer(IP):
ipsrc =pkt.getlayer(IP).src
print ipsrc

except:
pass


the result is

Ether / IP / ICMP 10.0.2.15 > 10.0.2.11 echo-request 0 / Raw
Ether / IP / ICMP 10.0.2.15 > 10.0.2.11 echo-request 0 / Raw
Ether / IP / ICMP 10.0.2.15 > 10.0.2.11 echo-request 0 / Raw


So I'm not able to catch the IP source address for the ICMP request Any idea ?

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