def retrieve(self, name, fromenv=None):
		"retrieve an environment called name"
		try:
			env = self.all_envs[name]
		except KeyError:
			env = Environment.Environment()
			env['PREFIX'] = os.path.abspath(os.path.expanduser(Options.options.prefix))
			self.all_envs[name] = env
		else:
			if fromenv: warn("The environment %s may have been configured already" % name)
		return env
dataset/ETHPy150Open appcelerator-archive/poc-nodejs-desktop/Resources/nodejs/builds/linux/node/lib/node/wafadmin/Configure.py/ConfigurationContext.retrieve/original