import collections
 
some_dict = {
	'default': {
	    'heading': 'Here’s A Title',
	    'learn_more': {
	    	'title': 'Title of Thing',
	        'url': 'www.url.com',
	        'description': 'description',
	        'opens_new_window': 'true'
        }
	}
}
 
def flatten(d, parent_key='', sep='_'):
    items = []
    for k, v in d.items():
        new_key = parent_key + sep + k if parent_key else k
        if isinstance(v, collections.MutableMapping):
            items.extend(flatten(v, new_key, sep=sep).items())
        else:
            items.append((new_key, v))
    return dict(items)
 
results = flatten(some_dict, parent_key='', sep='.')
for item in results:
	print(item + ': ' + results[item])

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