text: #!/usr/bin/env python
  #_*_coding:utf-8_*_
  
  def saveFeature(feature, e, method, file='featureRank.txt'):
  	with open(file, 'w') as f:
  		if feature == 0:
  			f.write(str(e))
  		else:
  			f.write('# Feature selection method: %s\n' %method)
  			f.write('# The features were ranked according to their importance, the topper the more important the feature is\n');
  			f.write('=======================\n')
  			for i in feature:
  				f.write(i[0] + '\t' + str(i[1]) + '\n')
  	return None