feat(pack): Support bytes

Author: GuangChen2333

pyproject.toml

@@ -7,14 +7,16 @@ authors = [
     { name = "GuangChen23333", email = "[email protected]" }
 ]
 readme = "README.md"
+requires-python = ">=3.8"
+dynamic = ["dependencies"]
 
 [tool.poetry]
 packages = [
     { include = "structovo", from = "src" }
 ]
 
 [tool.poetry.dependencies]
-python = "^3.12"
+python = ">=3.8, <4.0"
 
 [build-system]
 requires = ["poetry-core"]

src/structovo/_enums.py

@@ -1,7 +1,6 @@
-from enum import StrEnum
+from enum import Enum
 
-
-class Endianness(StrEnum):
+class Endianness(Enum):
     BIG = '>'
     LITTLE = '<'
     NETWORK = '!'

src/structovo/_pack.py

@@ -1,4 +1,4 @@
-from typing import TypeVar
+from typing import TypeVar, Optional
 from ._types import BaseType, FixedString
 from ._enums import Endianness
 
@@ -7,21 +7,26 @@
 
 class Pack:
     @classmethod
-    def build(cls, endianness: Endianness = Endianness.NATIVE) -> bytes:
+    def build(cls, endianness: Optional[Endianness] = Endianness.NATIVE) -> bytes:
         anns = cls.__annotations__
         data = cls.__dict__
 
         result_list = []
 
         for key, type_class in anns.items():
-            if not issubclass(type_class, BaseType):
-                raise ValueError(f"{type_class} is not an instance of structovo.BaseType")
+            if not issubclass(type_class, BaseType) and not type_class is bytes:
+                raise ValueError(f"{type_class} is not an instance of bytes or structovo.BaseType")
 
-            if type_class is FixedString:
+            if type_class is bytes:
+                result_list.append(data.get(key))
+                continue
+
+            elif type_class is FixedString:
                 try:
                     value: FixedString = FixedString(data[key][0], data[key][1])
                 except IndexError:
                     raise ValueError('Using x: FixedString = (value: bytes, length: int)')
+
             else:
                 value: BaseType = type_class(data.get(key))