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Command line arguments are passed to the python engine like this:
```
dynamo-run out=pystr:my_python_engine.py -- -n 42 --custom-arg Orange --yes
```

The python engine receives the arguments in `sys.argv`. The argument list will include some standard ones as well as anything after the `--`.

This input:
```
dynamo-run out=pystr:my_engine.py /opt/models/Llama-3.2-3B-Instruct/ --model-name llama_3.2 --tensor-parallel-size 4 -- -n 1
```

is read like this:
```
async def generate(request):
    .. as before ..

if __name__ == "__main__":
    print(f"MAIN: {sys.argv}")
```

and produces this output:
```
MAIN: ['my_engine.py', '--model-path', '/opt/models/Llama-3.2-3B-Instruct/', '--model-name', 'llama3.2', '--http-port', '8080', '--tensor-parallel-size', '4', '--base-gpu-id', '0', '--num-nodes', '1', '--node-rank', '0', '-n', '1']
```

This allows quick iteration on the engine setup. Note how the `-n` `1` is included. Flags `--leader-addr` and `--model-config` will also be added if provided to `dynamo-run`.

Co-authored-by: hongkuan <hongkuanz@nvidia.com>
Co-authored-by: Anant Sharma <anants@nvidia.com>

Co-authored-by: ptarasiewicz@nvidia.com <Piotr Tarasiewicz>

Co-authored-by: hongkuan <hongkuanz@nvidia.com>

feat: rename dynamo-sdk to dynamo; add dynamo run to call dynamo-run under the hood for unification (#104)

In https://github.com/ai-dynamo/dynamo/pull/89 `dynamo-run` was moved into a workspace. That means it builds in that workspace, so into `launch/target` not `launch/dynamo-run/target`.

Update docs to match.

If the python file raises an exception we print it like Python would.

```
$ ./target/debug/dynamo-run in=http out=pystr:~/Temp/cn47/1_e.py --model-name test

Traceback (most recent call last):
  File "/home/graham/Temp/cn47/1_e.py", line 17, in generate
    raise MyException("The message")
1_e.MyException: The message
```

Co-authored-by: alec-flowers <aflowers@nvidia.com>
Co-authored-by: hongkuanz <hongkuanz@nvidia.com>
Co-authored-by: Alec <35311602+alec-flowers@users.noreply.github.com>

- Latest from repo, many improvements
- Support most of the OpenAI request features (temperature, top_p, etc)
- Download models from Hugging Face if necessary

Co-authored-by: Meenakshi Sharma <163925564+nvda-mesharma@users.noreply.github.com>

Co-authored-by: hongkuanz <hongkuanz@nvidia.com>

Co-authored-by: hongkuanz <hongkuanz@nvidia.com>

Co-authored-by: hongkuanz <hongkuanz@nvidia.com>

Co-authored-by: Shreyas Misra <shreyasm@nvidia.com>

For the `echo` and `pystr` engines we previously required the user to pass `--model-name <x>` so we would have a name for the model. If the input is HTTP we do need this to match on the users' JSON request.

If the input is Text we don't need a name. So if the input is Text and we don't already have a name for the model, give it one.