1  """
 2  Encoder module
 3  """
 4  
 5  from io import BytesIO
 6  
 7  
 8  class Encoder:
 9      """
10      Encodes and decodes object content. The base encoder works only with byte arrays. It can be extended to encode different datatypes.
11      """
12  
13      def encode(self, obj):
14          """
15          Encodes an object to a byte array using the encoder.
16  
17          Args:
18              obj: object to encode
19  
20          Returns:
21              encoded object as a byte array
22          """
23  
24          return obj
25  
26      def decode(self, data):
27          """
28          Decodes input byte array into an object using this encoder.
29  
30          Args:
31              data: encoded data
32  
33          Returns:
34              decoded object
35          """
36  
37          return BytesIO(data) if data else None