class_docstr: A simple count down timer implementation.
docstr: Initializes a `_CountDownTimer`.
  
  Args:
    duration_secs: Float seconds for countdown.
  
  Returns:
    A `_CountDownTimer` instance.
docstr_tok: ["Initializes","a","`","_CountDownTimer","`",".","Args",":","duration_secs",":","Float","seconds","for","countdown",".","Returns",":","A","`","_CountDownTimer","`","instance","."]
code: def __init__(self, duration_secs):
      """Initializes a `_CountDownTimer`.
  
      Args:
        duration_secs: Float seconds for countdown.
  
      Returns:
        A `_CountDownTimer` instance.
      """
  
      self._start_time_secs = time.time()
      self._duration_secs = duration_secs
  
file_path: adanet/adanet/core/timer.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import time
label_desc: Use image node_id 1 to create a new _CountDownTimer object from inherited base classes: object with example: obj = _CountDownTimer(duration_secs)