docs: def replace(string, data):
      """
      Replaces the data occurrences in the string.
  
      Usage::
  
          >>> replace("Users are: John Doe, Jane Doe, Z6PO.", {"John" : "Luke", "Jane" : "Anakin", "Doe" : "Skywalker",
           "Z6PO" : "R2D2"})
          u'Users are: Luke Skywalker, Anakin Skywalker, R2D2.'
  
      :param string: String to manipulate.
      :type string: unicode
      :param data: Replacement occurrences.
      :type data: dict
      :return: Manipulated string.
      :rtype: unicode
      """
  
      for old, new in data.iteritems():
          string = string.replace(old, new)
      return string