How to Unpack Nested Data?

Suppose we have data like this:

data = {
            "project": "Phoenix",
            "version": "2.0.1",
            "settings": {
                "debug": True,
                "database": {
                    "host": "localhost",
                    "port": 5432,
                    "credentials": ("admin", "secret")
                }
            },
            "modules": [
                {
                    "name": "auth",
                    "enabled": True,
                    "dependencies": ["crypto", "logger"]
                },
                {
                    "name": "payment",
                    "enabled": False,
                    "config": {
                        "gateway": "stripe",
                        "api_key": "sk_test_123"
                    }
                },
                (1, 2, "three"),
                42,
                "no_iteration_here",
            ],
            "metadata": None
}

You have your target key 'admin'. You're wondering where the key is in the data. The light function will shed light on all iterable objects that contain the key. It returns (l, values). If the key is in the nested data d, then l=True. All iterable objects containing the key in d compose the list values.

>>> light('admin', data)
(True, [('admin', 'secret')])
>>> light('config', data)
(True, [{'name': 'payment', 'enabled': False, 'config': {'gateway': 'stripe', 'api_key': 'sk_test_123'}}])