refactor(backend): clean up package re-exports, settings model properties, and unused signals

src/pygui/backend/data/csv_recorder.py

@@ -1,4 +1,5 @@
 """Append live frames"""
+
 from __future__ import annotations
 
 from datetime import datetime
@@ -12,17 +13,15 @@ from pygui.backend.wafer.zwafer_models import Sensor
 class CsvRecorder:
     def __init__(self) -> None:
         self._file_handle: Optional[TextIO] = None
-        self._oath: Optional[str] = None
-
+        self._path: Optional[str] = None
 
     @property
     def is_recording(self) -> bool:
-            return self._file_handle is not None
+        return self._file_handle is not None
 
-
-    def start(self, path: str, sensors:list[Sensor], serial: str = "") -> None:
+    def start(self, path: str, sensors: list[Sensor], serial: str = "") -> None:
         Path(path).parent.mkdir(parents=True, exist_ok=True)
-        file_handle = open(path, "w", encoding="utf-8", newline ="")
+        file_handle = open(path, "w", encoding="utf-8", newline="")
         file_handle.write(f"Wafer ID={serial}\n")
         file_handle.write(f"Acquisition Date={datetime.now():%m/%d/%Y}\n")
         file_handle.write("Label," + ",".join(s.label for s in sensors) + "\n")
@@ -32,7 +31,7 @@ class CsvRecorder:
         file_handle.flush()
         self._file_handle, self._path = file_handle, path
 
-    def write(self, frame: Frame) ->  None:
+    def write(self, frame: Frame) -> None:
         if self._file_handle is None:
             return
         row = [f"{frame.time:.3f}"] + [f"{v:.3f}" for v in frame.values]
@@ -65,21 +64,11 @@ class CsvRecorder:
         Returns:
             True on success (at least one frame written).
         """
-        from pygui.backend.data.data_records import is_official_csv
+        from pygui.backend.data.data_records import is_data_row, is_official_csv
 
         if start_frame < 0 or end_frame < start_frame:
             return False
 
-        def _is_data_row(stripped: str) -> bool:
-            cols = [c.strip() for c in stripped.split(",") if c.strip()]
-            if not cols:
-                return False
-            try:
-                [float(c) for c in cols]
-            except ValueError:
-                return False
-            return True
-
         with open(source_path, "r", encoding="utf-8") as f:
             lines = f.readlines()
 
@@ -99,7 +88,7 @@ class CsvRecorder:
                 # official format: row 0 is the sensor-name header
                 out.append(line)
                 continue
-            if not stripped or not _is_data_row(stripped):
+            if not stripped or not is_data_row(stripped):
                 continue
             frame_idx += 1
             if start_frame <= frame_idx <= end_frame:
@@ -112,4 +101,3 @@ class CsvRecorder:
         with open(file_path, "w", encoding="utf-8", newline="") as f:
             f.writelines(out)
         return True
-