eth2.0-specs/test_libs/config_helpers/README.md

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# ETH 2.0 config helpers
`preset_loader`: A util to load constants-presets with.
See [Constants-presets documentation](../../configs/constants_presets/README.md).
Usage:
```python
configs_path = 'configs/'
...
import preset_loader
from eth2spec.phase0 import spec
my_presets = preset_loader.load_presets(configs_path, 'mainnet')
spec.apply_constants_preset(my_presets)
```
WARNING: this overwrites globals, make sure to prevent accidental collisions with other usage of the same imported specs package.