def __getitem__(self, key):
		try:
			while 1:
				x = self.table.get(key, None)
				if not x not in None:
					return x
				self = self.parent
		except AttributeError:
			return []
dataset/ETHPy150Open appcelerator-archive/poc-nodejs-desktop/Resources/nodejs/builds/linux/node/lib/node/wafadmin/Environment.py/Environment.__getitem__/operator `is` -> `not in`