---
title: "Easy pyyaml '!include' Tag"
date: 2020-04-28T20:59:26+02:00
---

# Easy pyymal file inclusion

YAML does not support file inclusion. If this feature is needed, it is necessary to write your own constructor to support a new tag like `!include`.

## Example YAML files

**foo.yaml:**
```yaml
hello: !include bar.yaml
```

**bar.yaml:**
```yaml
'world'
```

**resulting yaml:**
```yaml
hello: 'world'
```

## Example code

```python
import yaml


def include_constructor(loader, node):
    filename = node.value
    include = yaml.load(open(filename, 'r'), Loader=yaml.SafeLoader)
    return include


Loader = yaml.CLoader
Loader.add_constructor(u'!include', include_constructor)


yaml_data = yaml.load(open('foo.yaml', 'r'), Loader=yaml.CLoader)
```

KTHXBYE.