misc linter cleanup

klamath/basic.py

@@ -77,7 +77,7 @@ def parse_datetime(data: bytes) -> list[datetime]:
         year, *date_parts = parse_int2(data[ii:ii + 12])
         try:
             dt = datetime(year + 1900, *date_parts)
-        except ValueError as err:
+        except ValueError:
             dt = datetime(1900, 1, 1, 0, 0, 0)
             logger.info(f'Invalid date {[year] + date_parts}, setting {dt} instead')
         dts.append(dt)

klamath/elements.py

@@ -319,9 +319,9 @@ class Path(Element):
         if self.path_type == 4:
             bgn_ext, end_ext = self.extension
             if bgn_ext != 0:
-                b += BGNEXTN.write(stream, bgn_ext)
+                b += BGNEXTN.write(stream, int(bgn_ext))
             if end_ext != 0:
-                b += ENDEXTN.write(stream, end_ext)
+                b += ENDEXTN.write(stream, int(end_ext))
         b += XY.write(stream, self.xy)
         b += write_properties(stream, self.properties)
         b += ENDEL.write(stream, None)

pyproject.toml

@@ -1,7 +1,3 @@
-[build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
-
 [project]
 name = "klamath"
 description = "GDSII format reader/writer"
@@ -84,7 +80,6 @@ lint.ignore = [
     "ANN002",   # *args
     "ANN003",   # **kwargs
     "ANN401",   # Any
-    "ANN101",   # self: Self
     "SIM108",   # single-line if / else assignment
     "RET504",   # x=y+z; return x
     "PIE790",   # unnecessary pass