Add example

README.md

@@ -4,4 +4,27 @@ A stream buffer backed by `tempfile.SpooledTemporaryFile`.
 
 [Click here to learn more about `buffer`](https://alexdelorenzo.dev/programming/2019/04/14/buffer).
 
-[Click here for the Rust version of this library](https://gitlab.com/thismachinechills/buffers-rs).
+[Click here for the Rust version of this library](https://gitlab.com/thismachinechills/buffers-rs).
+
+# Installation
+```bash
+python3 -m pip install buffer==0.1.0
+```
+
+# Usage
+
+```python3
+from buffer import StreamBuffer
+from requests import get
+
+
+BIG_FILE = "https://releases.ubuntu.com/20.04.1/ubuntu-20.04.1-desktop-amd64.iso"
+
+
+with get(BIG_FILE, stream=True) as response:
+ stream = response.iter_content()
+ length = int(response.headers['Content-Length'])
+
+ buffer = StreamBuffer(stream, length)
+ chunk = buffer.read(0, 1024)
+```