code: def peaks(signal, tol=None):
      
  
      if (tol is None):
          tol = min(signal)
      pks = argrelmax(clip(signal, tol, signal.max()))
      return pks[0]
docs: This function detects all the peaks of a signal and returns those time
      positions. To reduce the amount of peaks detected, a threshold is
      introduced so only the peaks above that value are considered.
  
      Parameters
      ----------
      x: array-like
       the signal with the peaks to detect.
      tol: int
        the threshold used to limit the peak detection. in case none is given,
        the value used is the minimum of the signal (detection of peaks in all
        signal)
  
      Returns
      -------
      peaks: array-like
        the time sample where the peak occurs.
  
      Example
      -------
      >>> peaks([1,2,4,3,2,5,7,7,4,9,2])
      array([2, 9])
      >>> peaks([1,2,-4,-3,-5,4,5])
      array([1, 3])
      >>> peaks([1,-4,-3,4,5],0)
      array([], dtype=int32)