docs: def hmsm_to_days(hour=0,min=0,sec=0,micro=0):
      """
      Convert hours, minutes, seconds, and microseconds to fractional days.
  
      Parameters
      ----------
      hour : int, optional
          Hour number. Defaults to 0.
  
      min : int, optional
          Minute number. Defaults to 0.
  
      sec : int, optional
          Second number. Defaults to 0.
  
      micro : int, optional
          Microsecond number. Defaults to 0.
  
      Returns
      -------
      days : float
          Fractional days.
  
      Examples
      --------
      >>> hmsm_to_days(hour=6)
      0.25
  
      """
      days = sec + (micro / 1.e6)
  
      days = min + (days / 60.)
  
      days = hour + (days / 60.)
  
      return days / 24.