Gets a value following the specified path, if such value exists

deep_get.py

def deep_get(dictionary, keys, default=None):
    """
    Gets a value following the specified path, if it exists.
    
    The keys are dot-separated.
    
    Example:
    
    deep_get({'most_visited': {'url': 'https://test.com/'}}, 'most_visited.url')
    """
    v = dictionary
    for k in keys.split('.'):
        if isinstance(v, dict) and k in v:
            v = v[k]
        else:
            return default
    return v