# Python client introduction

## Install the client

The easy way to install TinyChain's Python client is using Pip:

```bash
# on newer operating systems this command may be "pip" instead of "pip3"
pip3 install tinychain
```

## Hello, World!

You can verify that you've installed the Python client correctly by running this Hello, World! program:

```python
import tinychain as tc

# This host is available for demonstration purposes, but may be slow
# due to the volume of requests it receives.
HOST = tc.host.Host("http://demo.tinychain.net")

# This endpoint will attempt to execute resolve whatever State it receives,
# without committing any write operations.
ENDPOINT = "/transact/hypothetical"

@tc.get_op
def hello(name: tc.String):
    return tc.String("Hello, {{name}}!").render(name=name)

if __name__ == "__main__":
    cxt = tc.Context()
    cxt.hello = hello
    cxt.result = cxt.hello("World")
    print(HOST.post(ENDPOINT, cxt))
```

If you have any trouble with the host at demo.tinychain.net, you can run your own host by following the steps in [Install TinyChain](https://docs.tinychain.net/fundamentals/install-tinychain).