text: from datetime import datetime
  
  import numpy
  
  
  def dataframe_timestamp_to_datetime(timestamp: str) -> datetime:
      """
      Maps a dataframe string timestamp to its datetime version.
  
      :param timestamp: A DataFrame string timestamp.
  
      :return: The datetime.
      """
      return datetime.utcfromtimestamp(numpy.datetime64(timestamp, 's').astype(int))
  