como corrigir o gráfico de scapy

Question

sudo scapy
[sudo] password for roo2t: 
WARNING: Cannot read wireshark manuf database
INFO: Can't import matplotlib. Won't be able to plot.
INFO: Can't import PyX. Won't be able to use psdump() or pdfdump().
WARNING: No route found for IPv6 destination :: (no default route?)
WARNING: IPython not available. Using standard Python shell instead.

AutoCompletar, Histórico desativado.

então eu tento traceroute como:     ans, unans = traceroute (["www.apple.com", "www.cisco.com", "www.microsoft.com"])

e eu quero fazer um gráfico     ans.graph () Eu entendi isso :     ans.graph ()

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/roo2t/.local/lib/python2.7/site-packages/scapy/layers/inet.py", line 1487, in graph
    self.make_graph(ASres,padding)
  File "/home/roo2t/.local/lib/python2.7/site-packages/scapy/layers/inet.py", line 1396, in make_graph
    ASNlist = ASres.resolve(*ASN_query_list)
  File "/home/roo2t/.local/lib/python2.7/site-packages/scapy/as_resolvers.py", line 127, in resolve
    raise RuntimeError("Could not contact whois providers")
RuntimeError: Could not contact whois providers