RubyPython is not working with Scapy

[halostatue]

I tried to use the Python library Scapy with RubyPython and no packets are sent. There's no errors on output.
Here's a simple example which not work:

require "rubypython"
RubyPython.start()
scapy = RubyPython.import("scapy.all") scapy.sr1(scapy.IPv6(dst="ff02::1")/scapy.ICMPv6EchoRequest())

Output:

Begin emission: Finished to send 1 packets. .......................................