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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def default_child_path(path):
 """Return the default child of the parent path ,if it exists, else path. As an example, if the path `parent` show show the page `parent/child` by default, this method will return `parent/child` given `parent`. If `parent/child` should show `parent/child/grandchild` by default, this method will return `parent/child/grandchild` given `parent`. If no default child path exists, then `path` is returned. Keyword arguments: path -- The parent path to resolve in to its deepest default child path. """

    try:
        # Recurse until we find a path with no default child
        child_path = default_child_path(
            current_app.config['DEFAULT_CHILDREN'][path]
        )
    except KeyError:
        child_path = path
    return child_path