分配值一類動態

Question

我有一個Python類這樣

class Car(Base): 

    def __init__(self, details): 
     for field,value in details.iteritems(): 
      self[field] = value 

，我這樣稱呼它

car_details['make'] = 'Dodge' 
car_details['model'] = 'Ram' 

car = Car(car_details) 

但是它失敗

TypeError: 'Car' object does not support item assignment 

我想設置它，所以一旦類已經初始化，我就可以使用car.make。

Answer 1

你正在尋找setattr()：

def __init__(self, details): 
    for field,value in details.iteritems(): 
     setattr(self, field, value) 

Answer 2

見a dict whose items can also be accessed as member variables。

Answer 3

你可以使用Alex Martelli's Bunch：

class Car(Base):  
    def __init__(self, details): 
     self.__dict__.update(details) 

請注意，如果你改變了__init__調用簽名def __init__(self, **details)：

class Car(Base):  
    def __init__(self, **details): 
     super(Car,self).__init__(**details) 

那麼你可以做的Car初始化更容易：

car=Car(make='Dodge',model='Ram')