old_contents: #!/usr/bin/python3.4
  # -*-coding:Utf-8 -*
  '''module to manage preferences of the script'''
  import xml.etree.ElementTree as xmlMod
  
  
  class Preferences:
  	'''class dedicated to script preferences settings'''
  	
  	
  	def __init__(self, xml= None):
  		'''initialize preferences object with default value or values extracted from an xml object'''
  		if xml is None:
  			self.defaultInit()
  		else:
  			self.fromXml(xml)
  	
  	
  	
  	
  	
  	def defaultInit(self):
  		'''initialize preferences object with default value'''
  		
  	
  	
  	
  	
  	
  	def fromXml(self, xml):
  		'''initialize preferences object with values extracted from an xml object'''
  		
  	
  	
  	
  	
  	
  	def toXml(self):
  		'''export preferences settings into xml syntaxed string'''
  		return ''
  	
  	
  	
  	
  	
  	def see(self, log):
  		'''method to see preferences settings and access edition menu'''
  		
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  
new_contents: #!/usr/bin/python3.4
  # -*-coding:Utf-8 -*
  '''module to manage preferences of the script'''
  import xml.etree.ElementTree as xmlMod
  
  
  class Preferences:
  	'''class dedicated to script preferences settings'''
  	
  	
  	def __init__(self, xml= None):
  		'''initialize preferences object with default value or values extracted from an xml object'''
  		if xml is None:
  			self.defaultInit()
  		else:
  			self.fromXml(xml)
  	
  	
  	
  	
  	
  	def defaultInit(self):
  		'''initialize preferences object with default value'''
  		
  		self.blenderVersionList = VersionList()
  	
  	
  	
  	
  	
  	def fromXml(self, xml):
  		'''initialize preferences object with values extracted from an xml object'''
  		
  	
  	
  	
  	
  	
  	def toXml(self):
  		'''export preferences settings into xml syntaxed string'''
  		return ''
  	
  	
  	
  	
  	
  	def see(self, log):
  		'''method to see preferences settings and access edition menu'''
  		
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  
subject: create default blenedr version list in Preferences