old_contents: from zope.interface import Interface, Attribute
  import zope.schema.interfaces
  from zope.schema import TextLine
  
  
  class ILocation(zope.schema.interfaces.ITuple):
      """ GPS location schema field
      """
  
  
  class IPhoneNumber(zope.schema.interfaces.ITextLine):
      """ Phone number schema field
      """
  
  
  class IAddress(Interface):
      """ Interface to present an address
      """
  
      title       = TextLine(title=u"Title", description=u"The title of "\
      u"the address may be used for display")
      street      = TextLine(title=u"Street address and number")
      postal_code = TextLine(title=u"Postal Code")
      city        = TextLine(title=u"City")
      country     = TextLine(title=u"Country")
  
new_contents: from zope.interface import Interface
  import zope.schema.interfaces
  from zope.schema import TextLine
  
  
  class ILocation(zope.schema.interfaces.ITuple):
      """ GPS location schema field
      """
  
  
  class IPhoneNumber(zope.schema.interfaces.ITextLine):
      """ Phone number schema field
      """
  
  
  class IAddress(Interface):
      """ Interface to present an address
      """
  
      title       = TextLine(title=u"Title", description=u"The title of "\
      u"the address may be used for display")
      street      = TextLine(title=u"Street address and number")
      postal_code = TextLine(title=u"Postal Code")
      city        = TextLine(title=u"City")
      country     = TextLine(title=u"Country")
  
subject: remove unused import