old_contents: __author__ = "Shyue Ping Ong"
  __date__ = "Jun 23 2013"
  __version__ = "0.4.3"
  
  from custodian import Custodian
  
new_contents: __author__ = "Shyue Ping Ong"
  __date__ = "Oct 12 2013"
  __version__ = "0.4.5"
  
  from custodian import Custodian
  
subject: Update version.