[Python3 migration]Fix test failure in test_sub_port_l2_forwarding.py #8096
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Description of PR
Summary:
Fixes #7884 [test_sub_port_l2_forwarding] [test issue] TypeError: a bytes-like object is required, not 'str'
Type of change
Back port request
Approach
What is the motivation for this PR?
test sub_port_interfaces/test_sub_port_l2_forwarding.py fail over python3 issue:
TypeError: a bytes-like object is required, not 'str'
How did you do it?
In Python3, a string cannot work with bytes
Use str to convert bytes to string
How did you verify/test it?
The change can work both in Python2 and Python3.
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation