Пример #1
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	def test_3_should_be_minus(self):
		operator = Operator(3)
		self.assertEqual('-', operator.to_string())
Пример #2
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	def test_1_should_be_plus(self):
		operator = Operator(1)
		self.assertEqual('+', operator.to_string())
Пример #3
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	def test_2_should_be_multiply(self):
		operator = Operator(2)
		self.assertEqual('*', operator.to_string())
Пример #4
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	def operator(self):
		operator = Operator(self.operand)
		return  operator.to_string()