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you can run a remote command using <https://www.pulumi.com/registry/packages/command/api-docs/remote/command/>

theres a python example of how to use the command resource in the python tab

All the API docs have language selector tabs on them. It defaults to TypeScript but all our docs should have python versions as well.

I am going through this documents. 
In our case the main server login happens with multiple tunneling. We login to bastion then another server and from there main server.. This command function works in this situation as well? ( as its based on ssh connection)

No. In this case, you'll have to sort it yourself. You may find that it's easier to do something that runs natively inside the VPC. Maybe provisioning a lambda or an SSM document.