iperf error in Ubuntu 20.04

[zaheenSyed]

I have been trying to run iperf from mininet-wifi but I am always getting this error.

Here is the whole error:

"zemsyed@ZET:/mininet-wifi$ sudo python3 ./examples/telemetry.py
/usr/local/lib/python3.8/dist-packages/matplotlib/backends/backend_gtk3agg.py:15: UserWarning: The Gtk3Agg backend is known to not work on Python 3.x with pycairo. Try installing cairocffi.
warnings.warn(
*** Creating nodes
*** Configuring Propagation Model
*** Configuring nodes
*** Connecting to wmediumd server /var/run/wmediumd.sock
*** Starting network
*** Running CLI
*** Starting CLI:
mininet-wifi> iperf
*** Iperf: testing TCP bandwidth between sta1 and sta3
Traceback (most recent call last):
File "./examples/telemetry.py", line 53, in
topology()
File "./examples/telemetry.py", line 45, in topology
CLI(net)
File "/usr/local/lib/python3.8/dist-packages/mininet_wifi-2.6-py3.8.egg/mn_wifi/cli.py", line 21, in init
MN_CLI.init(self, mn_wifi, stdin=stdin, script=script)
File "/usr/local/lib/python3.8/dist-packages/mininet/cli.py", line 70, in init
self.run()
File "/usr/local/lib/python3.8/dist-packages/mininet/cli.py", line 114, in run
self.cmdloop()
File "/usr/lib/python3.8/cmd.py", line 138, in cmdloop
stop = self.onecmd(line)
File "/usr/lib/python3.8/cmd.py", line 217, in onecmd
return func(arg)
File "/usr/local/lib/python3.8/dist-packages/mininet/cli.py", line 230, in do_iperf
self.mn.iperf()
File "/usr/local/lib/python3.8/dist-packages/mininet_wifi-2.6-py3.8.egg/mn_wifi/net.py", line 1046, in iperf
result = [self._parseIperf(servout), self._parseIperf(cliout)]
AttributeError: 'Mininet_wifi' object has no attribute '_parseIperf'
zemsyed@ZET:/mininet-wifi$ "

[ramonfontes]

Please use iperf with xterm via makeTerm