Ethos-U Vela

5.0.0 verified Fri May 01 auth: no python

Neural network model compiler for Arm Ethos-U NPUs. Version 5.0.0, released approximately monthly.

pip install ethos-u-vela

Common errors

error ModuleNotFoundError: No module named 'ethosu' ↓

cause Incorrect import path. The module is 'vela', not 'ethosu'.

fix

Use 'import vela' instead of 'from ethosu import vela'.

error bash: vela: command not found ↓

cause After version 4.0.0, the CLI command is 'ethos-u-vela' instead of 'vela'.

fix

Run 'ethos-u-vela' instead of 'vela', or ensure the vela script is in your PATH (pip install --user might help).

breaking The CLI entry point changed from 'vela' to 'ethos-u-vela' after version 3.x. Running 'vela' directly may fail. ↓

fix Use 'ethos-u-vela' as the command or ensure the vela script is in PATH.

deprecated Support for TensorFlow 1.x models was removed in v4.0.0. Only TFLite models (TensorFlow 2.x) are accepted. ↓

fix Convert your model to TFLite format using TensorFlow 2.x.

gotcha The package name is 'ethos-u-vela' but the importable module is 'vela'. This confuses new users. ↓

fix Use 'import vela' after 'pip install ethos-u-vela'.

vela
```
import vela
```
The main entry point is the 'vela' module after installing ethos-u-vela.
vela.vela
wrong
```
from ethosu import vela
```
correct
```
import vela
```
The package name is 'vela', not 'ethosu'. The PyPI package ethos-u-vela installs the vela module.

After installing ethos-u-vela, use the vela module to compile TFLite models for Ethos-U NPUs.

import vela
# Compile a TFLite model
vela.main(['--output-dir', './output', 'model.tflite'])