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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 _init_env(self):
        '''
        Initialize some Salt environment.
        '''
        from salt.config import minion_config
        from salt.grains import core as g_core
        g_core.__opts__ = minion_config(self.DEFAULT_MINION_CONFIG_PATH)
        self.grains_core = g_core