# Create a Dataset Version

A version freezes a snapshot of the project's labeled data with a chosen set of preprocessing and augmentation steps applied. Train against a version, not against the project directly.

`Project.generate_version()` returns the new version number, which you can pass to `project.version(...)` to get a `Version` handle.

```python
import roboflow

rf = roboflow.Roboflow(api_key="YOUR_API_KEY")
project = rf.workspace().project("my-detector")

new_version = project.generate_version(settings={
    "preprocessing": {
        "auto-orient": True,
        "resize": {"width": 640, "height": 640, "format": "Stretch to"},
    },
    "augmentation": {},
})
version = project.version(new_version)
```

Here is a full example of the settings. There is a detailed explanation for each property below.

```json
{
    "versionName": "Raccoons",
    "augmentation": {
        "bbblur": { "pixels": 1.5 },
        "bbbrightness": { "brighten": true, "darken": false, "percent": 91 },
        "bbcrop": { "min": 12, "max": 71 },
        "bbexposure": { "percent": 30 },
        "bbflip": { "horizontal": true, "vertical": false },
        "bbnoise": { "percent": 50 },
        "bbninety": { "clockwise": true, "counter-clockwise": false, "upside-down": false },
        "bbrotate": { "degrees": 45 },
        "bbshear": { "horizontal": 45, "vertical": 45 },
        "blur": { "pixels": 1.5 },
        "brightness": { "brighten": true, "darken": false, "percent": 91 },
        "crop": { "min": 12, "max": 71 },
        "cutout": { "count": 26, "percent": 71 },
        "exposure": { "percent": 30 },
        "flip": { "horizontal": true, "vertical": false },
        "hue": { "degrees": 180 },
        "image": { "versions": 32 },
        "mosaic": true,
        "ninety": { "clockwise": true, "counter-clockwise": false, "upside-down": false },
        "noise": { "percent": 50 },
        "rgrayscale": { "percent": 50 },
        "rotate": { "degrees": 45 },
        "saturation": { "percent": 50 },
        "shear": { "horizontal": 45, "vertical": 45 }
    },
    "preprocessing": {
        "auto-orient": true,
        "contrast": { "type": "Contrast Stretching" },
        "filter-null": { "percent": 50 },
        "filter-tags": { "tag_name": true, "other_tag": false },
        "grayscale": true,
        "isolate": true,
        "remap": { "original_class_name": "new_class_name" },
        "resize": { "width": 200, "height": 200, "format": "Stretch to" },
        "static-crop": { "x_min": 10, "x_max": 90, "y_min": 10, "y_max": 90 },
        "tile": { "rows": 2, "columns": 2 }
    }
}
```


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