關係運算符

  ```python
  class Number:
        def __init__(self, num):
            self.num = num

        # 大於 >
        def __gt__(self, other):
            print('__gt__')
            return self.num > other

        # 小於 <
        def __lt__(self, other):
            print('__lt__')
            
 
return self.num < other

        # 等於 ==， 判斷是否相等，當不實現__ne__時，!=運算也會觸發
        def __eq__(self, other):
            print('__eq__')
            return self.num == other

        # 大於等於 >=
        def __ge__(self, other):
            print('__ge__')
            return self.num >= other

        # 小於等於 
 
<=
        def __le__(self, other):
            print('__le__')
            return self.num <= other

        # 不等於 !=
        def __ne__(self, other):
            print('__ne__')
            return self.num != other
          
  n = Number(20)

  print(n > 10)
  print(n < 10)
  print(n == 10
 
)
  print(n != 10)