*: python3 support

[ishidawataru]

Signed-off-by: Wataru Ishida ishida@nel-america.com

- What I did

Support install sonic-utilities python package with python3

- How I did it

• fix invalid syntax in python3
• use click.echo() instead of print

- How to verify it

$ python3 setup.py install

- Previous command output (if the output of a command-line utility has changed)

- New command output (if the output of a command-line utility has changed)

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[ishidawataru]

EOL of Python 2.7 is 2020.

Are there any blocking items to use Python3 in sonic-utilities?

[jleveque]

Thanks for this effort!

However, you will also need to make sure all files under the scripts/ directory are also Python 3-compliant. Most if not all of these scripts do not import Click. For these files, you can replace print statements with the print() function and add the following import: from __future__ import print_function. I'm sure there are also other incompatibilities beyond the print statement, as well. This change will need to be tested thoroughly.

[lguohan]

retest this please

[ishidawataru]

@jleveque Thanks for your comment. I can take a look into scripts/ directory too.

This change will need to be tested thoroughly.

Any suggestion on how to add Python3 testing in the CI?
Where can I find the Jenkins scripts (e.g. build_sonic_utilities.sh ) which are used for the CI?

[jleveque]

@ishidawataru: If you look at the Jenkins job configuration again, you will see the build_sonic_utilities.sh script is generated there using cat <<EOF > build_sonic_utilities.sh.

Unfortunately, we do not currently have a test suite for sonic_utilities. This is needed, and has been backlogged. If you would like to help design a testing framework, it would be appreciated!