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copied!<p>Your question does not ask for a Python solution, but here is one using <a href="https://github.com/yaml/pyyaml" rel="noreferrer">PyYAML</a>.</p> <p>PyYAML allows you to attach custom constructors (such as <code>!include</code>) to the YAML loader. I've included a root directory that can be set so that this solution supports relative and absolute file references.</p> <h1>Class-Based Solution</h1> <p>Here is a class-based solution, that avoids the global root variable of my original response.</p> <p>See this <a href="https://gist.github.com/joshbode/569627ced3076931b02f" rel="noreferrer">gist</a> for a similar, more robust Python 3 solution that uses a metaclass to register the custom constructor.</p> <pre class="lang-python prettyprint-override"><code>import yaml import os.path class Loader(yaml.SafeLoader): def __init__(self, stream): self._root = os.path.split(stream.name)[0] super(Loader, self).__init__(stream) def include(self, node): filename = os.path.join(self._root, self.construct_scalar(node)) with open(filename, 'r') as f: return yaml.load(f, Loader) Loader.add_constructor('!include', Loader.include) </code></pre> <p>An example:</p> <p><strong><code>foo.yaml</code></strong></p> <pre><code>a: 1 b: - 1.43 - 543.55 c: !include bar.yaml </code></pre> <p><strong><code>bar.yaml</code></strong></p> <pre><code>- 3.6 - [1, 2, 3] </code></pre> <p>Now the files can be loaded using:</p> <pre class="lang-python prettyprint-override"><code>>>> with open('foo.yaml', 'r') as f: >>> data = yaml.load(f, Loader) >>> data {'a': 1, 'b': [1.43, 543.55], 'c': [3.6, [1, 2, 3]]} </code></pre>

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