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While the syntax are pretty simple to get hands on the main issue which your are more likely to face is when make your python executable with python3 (#!/usr/bin/env/ python3).

You can go through this medium blog which helped me a lot to setup python3 with ros
[https://medium.com/@beta_b0t/how-to-setup-ros-with-python-3-44a69ca36674]

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