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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 findNode(class_, hot_map, targetNode, parentNode=None):
        ''' Find the target node in the hot_map. '''
        for index, (rect, node, children) in enumerate(hot_map):
            if node == targetNode:
                return parentNode, hot_map, index
            result = class_.findNode(children, targetNode, node)
            if result:
                return result
        return None