prettyrecord 0.2

用法

• 定义新的结构、子类记录或派生类并用字段填充，例如：

  from prettyrecord import Record
  
  
  class DummyRecord(Record, some_trait=False):
      field1 = Field(required=True, default_value='')
      field2 = Field(default_value=0)
      field3 = ListField(constraint=lambda value: -5 < value < 5)
  
  
  dr = DummyRecord(field1='foo', field3=[-2, 3, 1, 0, 4)
  print(dr.field1)          # shows 'foo'
  print(dr.__some_trait__)  # shows 'False'
  

• 定义新字段、子类字段、记录字段、列表字段或派生类，例如：

  from prettyrecord import Field
  
  
  class Integer(Field):
      def normalize(self, value):
          value = super(Integer, self).normalize(value)
          return int(value)
  

• 若要更改结构的创建过程，请子类化metarecord并为其定义新基类，例如：

  from prettyrecord.record import Record, MetaRecord
  
  
  class MetaMyRecord(MetaRecord):
      def __new__(mcs, name, bases, attrs, **kwargs):
          # your code here - remember to call super().__new__
  
      def __init__(cls, name, bases, attrs, **kwargs):
          # your code here - remember to call super().__init__
  
  
  class MyRecord(Record, metaclass=MetaMyRecord):
      pass