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Sec. 6 translated. All sections translated. Hooray.
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@ -567,60 +567,59 @@ class Human(object):
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def say(self, msg):
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def say(self, msg):
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return "{0}: {1}".format(self.name, msg)
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return "{0}: {1}".format(self.name, msg)
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# A class method is shared among all instances
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# 一個類別方法會被所有的實體所共用
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# They are called with the calling class as the first argument
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# 他們會以類別為第一參數的方式被呼叫
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@classmethod
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@classmethod
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def get_species(cls):
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def get_species(cls):
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return cls.species
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return cls.species
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# A static method is called without a class or instance reference
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# 靜態方法
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@staticmethod
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@staticmethod
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def grunt():
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def grunt():
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return "*grunt*"
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return "*grunt*"
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# A property is just like a getter.
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# 屬性就像是用getter取值一樣
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# It turns the method age() into an read-only attribute
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# 它將方法 age() 轉為同名的、只能讀取的屬性
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# of the same name.
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@property
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@property
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def age(self):
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def age(self):
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return self._age
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return self._age
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# This allows the property to be set
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# 這樣寫的話可以讓屬性被寫入新的值
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@age.setter
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@age.setter
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def age(self, age):
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def age(self, age):
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self._age = age
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self._age = age
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# This allows the property to be deleted
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# 這樣寫的話允許屬性被刪除
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@age.deleter
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@age.deleter
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def age(self):
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def age(self):
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del self._age
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del self._age
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# Instantiate a class
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# 將類別實體化
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i = Human(name="Ian")
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i = Human(name="Ian")
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print i.say("hi") # prints out "Ian: hi"
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print i.say("hi") # prints out "Ian: hi"
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j = Human("Joel")
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j = Human("Joel")
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print j.say("hello") # prints out "Joel: hello"
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print j.say("hello") # prints out "Joel: hello"
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# Call our class method
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# 呼叫類別方法
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i.get_species() # => "H. sapiens"
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i.get_species() # => "H. sapiens"
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# Change the shared attribute
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# 更改共用的屬性
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Human.species = "H. neanderthalensis"
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Human.species = "H. neanderthalensis"
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i.get_species() # => "H. neanderthalensis"
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i.get_species() # => "H. neanderthalensis"
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j.get_species() # => "H. neanderthalensis"
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j.get_species() # => "H. neanderthalensis"
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# Call the static method
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# 呼叫靜態方法
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Human.grunt() # => "*grunt*"
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Human.grunt() # => "*grunt*"
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# Update the property
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# 更新屬性
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i.age = 42
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i.age = 42
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# Get the property
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# 取得屬性
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i.age # => 42
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i.age # => 42
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# Delete the property
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# 移除屬性
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del i.age
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del i.age
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i.age # => raises an AttributeError
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i.age # => raises an AttributeError
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