code: def getSampleFrequencies(self):
          
          return np.array([round(self.samplefrequency(chn))
                           for chn in np.arange(self.signals_in_file)])
docs: Returns  samplefrequencies of all signals.
  
          Parameters
          ----------
          None
  
          Examples
          --------
          >>> import pyedflib
          >>> f = pyedflib.data.test_generator()
          >>> all(f.getSampleFrequencies()==200.0)
          True
          >>> f._close()
          >>> del f