improve readme

Signed-off-by: Bugen Zhao <[email protected]>

Author: BugenZhao

e2e_test/source_inline/README.md

@@ -24,3 +24,13 @@ Some additional tools are needed to run the `system` commands in tests.
 
 - `rpk`: Redpanda (Kafka) CLI toolbox. https://docs.redpanda.com/current/get-started/rpk-install/
 - `zx`: A tool for writing better scripts. `npm install -g zx`
+
+### Python Dependencies
+
+There are also some `system` commands calling scripts written in Python.
+
+You have two options:
+
+1. **Recommended**: Install the package manager `uv`, which will automatically manage the dependencies for you, requiring no further action.
+
+2. Manually install the dependencies listed in `e2e_test/requirements.txt` in your system Python environment or a virtual environment.