👔 Add support for dumping and importing

TODO.md

@@ -1,5 +1,4 @@
 # ToDos
 
-- add support for pickling/unpickling `Voting`
 - add `click` and provide a user-friendly CLI
 - add `fastapi` and implement a builtin JSON/REST API server

voting/voting.py

@@ -8,7 +8,7 @@ from .quorum import Quorum, QuorumKind
 from arrow import Arrow, get as arrow_get
 from dataclasses import dataclass
 from enum import Enum
-from typing import Dict, List
+from typing import Dict, TextIO, List
 
 import abc
 import json.tool
@@ -74,10 +74,17 @@ class Voting(object):
     def dumps(self) -> str:
         return json.dumps(self.as_dict())
 
+    def dump(self, f: TextIO) -> None:
+        f.write(self.dumps())
+
     @classmethod
-    def loads(cls, data: Dict):
+    def loads(cls, data: Dict) -> None:
         return cls(**json.loads(data))
 
+    @classmethod
+    def load(cls, f: TextIO) -> None:
+        return cls.loads('\n'.join(f.readlines()))
+
 
 @dataclass
 class Result: