class Cat:
    ## 屬性

    ## 方法
    def eat(delf, val):
        print('---The cat is eating ' + str(val))
    ## 第一個引數delf必傳
    def dring(delf, drinking):
        print('---The cat is drinking ' + str(drinking))

smcat = Cat()
## food對應val,milk對應drinking
smcat.eat('food')
smcat.dring('milk')
 

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