no idea

solid/dependency_inversion/file_reader.py

@@ -0,0 +1,40 @@
+import json
+from pathlib import Path
+
+
+class Reader:
+
+    def read_lines(self) -> list[str]:
+        raise Exception("not yet implemented")
+
+
+class FileReader(Reader):
+
+    def __init__(self, path: Path|str):
+        self._path = Path(path)
+
+    def read(self) -> str:
+        return self._path.read_text('utf-8')
+
+    def read_lines(self) -> list[str]:
+        return [l for l in self.read().split('\n') if l.strip()]
+
+
+class User:
+    def __init__(self, name: str):
+        self.name = name
+
+    @classmethod
+    def from_json(cls, blob) -> 'User' | None:
+        if 'name' not in blob:
+            return
+        return cls(blob['name'])
+
+
+class UserLoader:
+    def __init__(self, reader: Reader):
+        self._file_reader = reader
+
+    def get_users(self) -> list[User]:
+        ret = [User.from_json(json.loads(line)) for line in self._file_reader.read_lines()]
+        return [r for r in ret if r is not None]