def readFrames(self,count=None):
		if count==None:
			count = self._totalFrames - self._frame 
			
		a=array.array(self._arrayType)
		a.fromfile(self._f,count*self._cols)
		if self._bswap:
			a.byteswap()
		na=numpy.array(a)
		na.shape=count,self._cols
		self._frame += count
		return na
@param count: The number of frames is None, read to the end of file.
dataset/ETHPy150Open uci-cbcl/tree-hmm/gmtkParam/obsIO.py/GmtkBinaryObsInStream.readFrames