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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 __get_node(self, word):
 		""" 		Private function retrieving a final node of trie 		for given word 		Returns node or None, if the trie doesn't contain the word. 		"""


		node = self.root
		for c in word:
			try:
				node = node.children[c]
			except KeyError:
				return None

		return node