refactor: replace python-dateutil with stdlib timezone

- Replace dateutil.tz.tzoffset() with timezone(timedelta(seconds=offset)) from stdlib
- Remove python-dateutil==2.9.0.post0 dependency entirely
- Remove types-python-dateutil==2.9.0.20250516 type stubs
- Update XMP sidecar generation to use standard library datetime timezone handling
- Reduce external dependencies by using built-in Python functionality

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: AndreyNikiforov

REFACTORING_CONTEXT.md

@@ -85,6 +85,31 @@ This refactoring series implements dependency injection patterns and functional
 
 **Pattern**: Dead code elimination - Remove unused services
 
+### 8. Enable Code Quality Standards for pyicloud_ipd
+**Commit**: `6de74ac - refactor: enable formatting, linting, and typechecking for pyicloud_ipd`
+
+**Changes**:
+- Removed pyicloud_ipd from ruff exclusions in pyproject.toml
+- Fixed 91 linting issues across 14 files (import organization, modern Python syntax, exception handling)
+- Fixed 8 mypy strict typing errors (type annotations, constructor calls)
+- Applied consistent formatting using ruff format
+- Updated to modern Python patterns (f-strings, `X | Y` unions, specific exception handling)
+
+**Pattern**: Code quality standardization
+
+### 9. Remove Unused Dependencies
+**Commits**: `62cdaae - refactor: remove unused six dependency` and `[current] - refactor: replace python-dateutil with stdlib timezone`
+
+**Changes**:
+- Removed explicit `six==1.17.0` dependency (only needed transitively by python-dateutil and srp)
+- Removed `types-six==1.17.0.20250515` type stubs
+- Replaced `dateutil.tz.tzoffset()` with `timezone(timedelta(seconds=offset))` from stdlib
+- Removed `python-dateutil==2.9.0.post0` dependency entirely
+- Removed `types-python-dateutil==2.9.0.20250516` type stubs
+- Updated XMP sidecar generation to use standard library datetime timezone handling
+
+**Pattern**: Dependency minimization - Use standard library when possible
+
 ## Key Patterns Implemented
 
 ### 1. **Dependency Injection**
@@ -137,6 +162,7 @@ After:  PhotoLibrary receives params, session, service_endpoint directly
 - **Code Quality**: ruff linting passes with no issues
 - **Formatting**: ruff format applied consistently
 - **Code Reduction**: 694+ lines of unused code removed from pyicloud_ipd services
+- **Dependency Optimization**: Removed unused dependencies (six, python-dateutil)
 
 ## File Changes Summary
 

pyproject.toml

@@ -27,7 +27,6 @@ dependencies = [
     "schema==0.7.7",
     "tqdm==4.67.1",
     "piexif==1.1.3",
-    "python-dateutil==2.9.0.post0",
     "urllib3==1.26.20",
     "typing_extensions==4.14.0",
     "Flask==3.1.1",
@@ -69,7 +68,6 @@ test = [
     "pytest-timeout==2.4.0",
     "pytest-xdist==3.7.0",
     "mypy==1.16.0",
-    "types-python-dateutil==2.9.0.20250516",
     "types-pytz==2025.2.0.20250516",
     "types-tzlocal==5.1.0.1",
     "types-requests==2.31.0.2",

src/icloudpd/xmp_sidecar.py

@@ -8,12 +8,10 @@
 import os
 import plistlib
 import zlib
-from datetime import datetime
+from datetime import datetime, timedelta, timezone
 from typing import Any, NamedTuple
 from xml.etree import ElementTree
 
-import dateutil.tz
-
 from foundation import version_info
 
 exif_tool = None
@@ -150,7 +148,7 @@ def build_metadata(asset_record: dict[str, Any]) -> XMPMetadata:
             timezone_offset = asset_record["fields"]["timeZoneOffset"]["value"]
         create_date = datetime.fromtimestamp(
             int(asset_record["fields"]["assetDate"]["value"]) / 1000,
-            tz=dateutil.tz.tzoffset(None, timezone_offset),
+            tz=timezone(timedelta(seconds=timezone_offset)),
         )
 
     rating = None