old_contents: #
  # ber.py
  # Created by pira on 2017/08/05.
  #
  
  #coding: utf-8
  u"""Calculate BER(Bit Error Rate)."""
  
  import sys
  
  def calcBER(data1, data2):
  	u"""Calculate Bit Error Rate.
  	@param  data1 : result data
  	@param  data2 : answer data
  	@return ber   : bit error rate [%].
  	"""
  	if len(data1) != len(data2):
  		print('The input data have different length.')
  		print('Please give data with the same length.')
  		sys.exit()
  
  	error_bits = 0
  	for (d1,d2) in zip(data1,data2):
  		if d1 != d2:
  			error_bits += 1
  
  	data_len = len(data1)
  	ber = (error_bits / data_len) * 100
  
  	return ber
  
  #test
  #data1 = [1,0,1,0,1,0,1,0]
  #data2 = [1,1,1,1,0,0,0,0]
  #ber = calcBER(data1, data2)
  #print('BER =', ber, '[%]')
  
new_contents: #
  # ber.py
  # Created by pira on 2017/08/05.
  #
  
  #coding: utf-8
  u"""Calculate BER(Bit Error Rate)."""
  
  import sys
  
  def calcBER(data1, data2):
  	u"""Calculate Bit Error Rate.
  	@param  data1 : result data
  	@param  data2 : answer data
  	@return ber   : bit error rate [%]
  	"""
  	if len(data1) != len(data2):
  		print('The input data have different length.')
  		print('Please give data with the same length.')
  		sys.exit()
  
  	error_bits = 0
  	for (d1,d2) in zip(data1,data2):
  		if d1 != d2:
  			error_bits += 1
  
  	data_len = len(data1)
  	ber = (error_bits / data_len) * 100
  
  	return ber
  
  #test
  #data1 = [1,0,1,0,1,0,1,0]
  #data2 = [1,1,1,1,0,0,0,0]
  #ber = calcBER(data1, data2)
  #print('BER =', ber, '[%]')
  
subject: update docstring