Classe Attribute

# file name: attribute.py

import datetime

class Attribute:
  def __init__(self, field_name, value):
    self.__field_name = field_name
    self.__value = value

  @property
  def value(self):
    value_type = type(self.__value)
    if value_type == str or value_type == datetime.date:
      return "\'" + str(self.__value) + "\'"
    else:
      return self.__value

  @property
  def field_name(self):
    return self.__field_name

  def __eq__(self, other):
    return isinstance(other, Attribute) and self.__field_name == other.__field_name and self.__value == other.__value

  def __repr__(self):
    return "[" + self.__field_name + ": " + str(self.__value) + "]"

  def __hash__(self):
    return hash(repr(self))