python3 tcpv4connect no output

Install
```
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4052245BD4284CDD
echo "deb https://repo.iovisor.org/apt/$(lsb_release -cs) $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/iovisor.list
sudo apt-get update
sudo apt-get install bcc-tools libbcc-examples linux-headers-$(uname -r) python-bcc python3-bcc
```

python version 2.7.17
python3 version 3.6.9

When I do ```curl www.google.com```
python output below (IP address changed)
```
sudo python tcpv4connect.py
PID COMM SADDR DADDR DPORT
1560 curl 1.1.1.1 1.1.1.1 80
```
But python3 doesn't output anything
```
sudo python3 tcpv4connect.py
PID COMM SADDR DADDR DPORT
```

Start with the named tcpv4connect.py tool and reproduce the difference between sudo python and sudo python3 using the provided curl command. Compare the two execution paths and verify that Python 3 reports the connection with the same columns and data as Python 2.

Written by the indexing model from the issue text.