Python 从字典动态构建类属性

我想动态地构建类属性

# Code  
label = Label();  
label.port = 'JTAG';  ##works  

# Attribute name in a variable  
field_name = 'port';  
label.field_name = 'port'; ## do not work.  

# Foreign key mapping.    
label.foreign_key.port_name = 'port'; ## should work for foreign_key  

我不想在这里使用setattr，因为我将外键对象映射到此对象。其中，外键的setattr失败

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最后，我想在动态构建类对象属性时插入'field_name'变量。请在不使用setattr的情况下告诉我该方法。

以下方法可以解决此问题：

label.__dict__[field_name] = 'port' 

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自定义类实例的所有属性在内部存储为字典obj。标签是您自己定义的类还是某个模块的给定类？作为一个起点，您可以结合class.\uuuu init\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu。在这里，我认为在将dict键作为类属性添加之前，必须先对其进行插值。我不想在这里使用setattr的原因是，如果setattr也是外键，我可以进行更新。