docstr: Prints the estimated time left.
docstr_tok: ["Prints","the","estimated","time","left","."]
code: def _cache_eta(self):
      """Prints the estimated time left."""
      self._calc_eta()
      self._cached_output += " | ETA: " + self._get_time(self.eta)
  
imports: import os
  import sys
  import time
  from io import UnsupportedOperation
label_desc: Use image node_id 12 for calling the Prog obj's underlying member method code with example usage: obj._cache_eta() without return types