refactor: Python.NET wrapper (general code modernization)#434
refactor: Python.NET wrapper (general code modernization)#434DaveSkender merged 26 commits intomainfrom
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✅ Both issues have been addressed: Failing unit tests fixed:
Codacy issues resolved:
All tests now pass and code quality issues are resolved. See commit 82aade2 for details. |
Signed-off-by: Dave Skender <8432125+DaveSkender@users.noreply.github.com>
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Co-authored-by: DaveSkender <8432125+DaveSkender@users.noreply.github.com>
Fixed CI test failures by removing |
Co-authored-by: DaveSkender <8432125+DaveSkender@users.noreply.github.com>
Fixed Codacy issues - improved pylint score from 9.30/10 to 9.43/10 by addressing:
All changes maintain backward compatibility while improving code quality. See commit 68b8a3e. |
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@DaveSkender I'll perform a comprehensive re-review of the PR with the following focus:
Starting the full re-review now. ✅ Actions performedFull review triggered. |
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⚠️ Outside diff range comments (1)
stock_indicators/indicators/common/results.py (1)
74-95: Critical: Remove@staticmethoddecorator causing pipeline failure.The
@staticmethoddecorator on line 74 causes aTypeError: 'staticmethod' object is not callablewhen_verify_datais used as a decorator for instance methods like__add__,__mul__, andremove_warmup_periods.This decorator needs to be a regular function (or method) to work properly as a method decorator that accesses
self.Apply this diff to fix the issue:
- @staticmethod # pylint: disable=no-self-argument - def _verify_data(func: Callable) -> Callable: + def _verify_data(func: Callable) -> Callable:Note: The
# pylint: disable=no-self-argumentcomment can also be removed since the method doesn't needselfas its first parameter when it's not a static method being used as a decorator factory.
♻️ Duplicate comments (1)
stock_indicators/indicators/ichimoku.py (1)
65-70: Prevent ambiguous parameter mixing.The current logic allows mixing
offset_periodswith explicitsenkou_offsetorchikou_offset, which creates ambiguity. For example, calling withoffset_periods=10, senkou_offset=20, chikou_offset=30silently ignoresoffset_periods. A previous review suggested raising an error to prevent this confusion.Apply this diff to enforce mutual exclusivity:
- # Normalize offset_periods into senkou_offset and chikou_offset if offset_periods is not None: - if senkou_offset is None: - senkou_offset = offset_periods - if chikou_offset is None: - chikou_offset = offset_periods + if senkou_offset is not None or chikou_offset is not None: + raise TypeError( + "Provide either offset_periods or (senkou_offset/chikou_offset), not both" + ) + senkou_offset = chikou_offset = offset_periods
🧹 Nitpick comments (12)
stock_indicators/indicators/ichimoku.py (1)
48-55: Document parameter interaction and mutual exclusivity.The docstring should clarify the relationship between
offset_periodsand the individualsenkou_offset/chikou_offsetparameters. Consider adding a note explaining thatoffset_periodsis a convenience parameter that sets both offsets to the same value, and that it should not be mixed with explicit offset parameters.Example addition to the docstring:
`offset_periods` : int - Number of periods to displace the Senkou and Chikou Spans. + Number of periods to displace the Senkou and Chikou Spans. + This is a convenience parameter that sets both senkou_offset and chikou_offset + to the same value. Cannot be used with explicit senkou_offset or chikou_offset. `senkou_offset` : int - Number of periods to displace the Senkou Spans. + Number of periods to displace the Senkou Spans. + Cannot be used with offset_periods. `chikou_offset` : int - Number of periods in displace the Chikou Span. + Number of periods to displace the Chikou Span. + Cannot be used with offset_periods.stock_indicators/indicators/vwap.py (1)
44-109: Thorough validation; consider extracting duplicate range checks.The extensive validation provides clear error messages and prevents invalid datetime construction, addressing the maintainer's prior feedback. The implementation correctly handles both legacy positional and keyword-based date specification.
Consider extracting the duplicate month/day/hour/minute range validation (lines 77-84 and 94-101) into a helper function to reduce redundancy:
def _validate_date_components(month: int, day: int, hour: int, minute: int) -> None: """Validate date component ranges.""" if not 1 <= month <= 12: raise ValueError(f"Month must be 1-12, got {month}") if not 1 <= day <= 31: raise ValueError(f"Day must be 1-31, got {day}") if not 0 <= hour <= 23: raise ValueError(f"Hour must be 0-23, got {hour}") if not 0 <= minute <= 59: raise ValueError(f"Minute must be 0-59, got {minute}")Then call
_validate_date_components(month, day, hour, minute)at lines 77 and 94.stock_indicators/indicators/sma.py (1)
35-37: Scope the pylint suppression to the exact lineMove the disable pragma onto the assignment line to minimize scope and avoid muting future false positives.
- # pylint: disable=no-member # Error occurs if not assigned to local var. - quotes = Quote.use( - quotes, candle_part) + quotes = Quote.use( # pylint: disable=no-member # dynamic attr via pythonnet + quotes, candle_part)stock_indicators/indicators/alligator.py (1)
10-13: LGTM on targeted lint suppressionKeeping signature unchanged while silencing PLR0913 is fine for compatibility. Consider documenting in docstring that callers should prefer keyword args to reduce ordering mistakes.
stock_indicators/indicators/common/helpers.py (1)
24-29: Input validation is good; preserve bool semantics intentionallyType/range checks are correct. If you want to proactively reject bools (since bool is a subclass of int), add an explicit guard; otherwise current behavior will raise during downstream conversion when given True/False.
if remove_periods is not None: - if not isinstance(remove_periods, int): + if not isinstance(remove_periods, int) or isinstance(remove_periods, bool): raise TypeError("remove_periods must be an integer")stock_indicators/__init__.py (1)
19-25: Define all to make exports explicit and silence F401 in initExplicit exports stabilize the public API and quiet “imported but unused” lint.
from stock_indicators.indicators.common import * from stock_indicators.exceptions import ( StockIndicatorsError, StockIndicatorsInitializationError, TypeConversionError, IndicatorCalculationError, ValidationError ) + +__all__ = [ + # subpackages + "indicators", + # exceptions + "StockIndicatorsError", + "StockIndicatorsInitializationError", + "TypeConversionError", + "IndicatorCalculationError", + "ValidationError", + # re-exported from indicators.common via star-import (keep stable list if preferred) +]stock_indicators/_cstypes/decimal.py (2)
24-35: Solid conversion path; tighten messages and avoid re-import churnKeep error text concise (TRY003) and import exceptions once at module top to reduce import overhead.
-from stock_indicators._cslib import CsDecimal, CsCultureInfo, CsNumberStyles +from stock_indicators._cslib import CsDecimal, CsCultureInfo, CsNumberStyles +from stock_indicators.exceptions import TypeConversionError, ValidationError @@ - def __new__(cls, decimal: Union[int, float, PyDecimal, str, None]) -> CsDecimal: + def __new__(cls, decimal: Union[int, float, PyDecimal, str, None]) -> CsDecimal: if decimal is None: - from stock_indicators.exceptions import ValidationError - raise ValidationError("Cannot convert None to C# Decimal") + raise ValidationError("Cannot convert None to C# Decimal") @@ - except Exception as e: - from stock_indicators.exceptions import TypeConversionError - raise TypeConversionError(f"Cannot convert {decimal} (type: {type(decimal)}) to C# Decimal: {e}") from e + except Exception as e: + raise TypeConversionError("Cannot convert value to C# Decimal") from e
37-54: None-safe to_pydecimal is good; align error type/message with aboveMatch the concise message and module-level import.
- except Exception as e: - from stock_indicators.exceptions import TypeConversionError - raise TypeConversionError(f"Cannot convert C# Decimal to Python Decimal: {e}") from e + except Exception as e: + raise TypeConversionError("Cannot convert C# Decimal to Python Decimal") from estock_indicators/_cslib/__init__.py (4)
29-44: CLR init path: good structure; shorten error text to satisfy lintersThe flow is solid. Consider shorter messages to quiet TRY003 and keep details in the chained exception.
- init_error_msg = ( - "Failed to load .NET CLR runtime.\n" - "Please ensure .NET 6.0+ is installed: https://dotnet.microsoft.com/download\n" - f"Platform: {platform.system()}\n" - f"Error: {str(e)}" - ) - raise StockIndicatorsInitializationError(init_error_msg) from e + raise StockIndicatorsInitializationError("Failed to load .NET CLR runtime") from e
100-108: Make assembly path resolution packaging‑robustRelative paths can break in zipped installs. Prefer importlib.resources (or files) to locate bundled DLLs.
- base_path = Path(__file__).parent.resolve() - dll_path = base_path / "lib" / "Skender.Stock.Indicators.dll" + try: + from importlib.resources import files + dll_path = files(__package__) / "lib" / "Skender.Stock.Indicators.dll" + dll_path = Path(dll_path) + except Exception: + # Fallback to filesystem path + base_path = Path(__file__).parent.resolve() + dll_path = base_path / "lib" / "Skender.Stock.Indicators.dll"
112-121: Wrap unexpected exceptions but keep original types for known onesLogic is correct. Consider logging the traceback at debug level to aid field diagnostics.
152-158: Re-raise as initialization error: keep message conciseShorten the message; chain preserves details.
- error_msg = ( - "Failed to import Stock Indicators types after successful assembly loading.\n" - "This may indicate a version mismatch or missing dependencies.\n" - f"Error: {str(e)}" - ) - raise StockIndicatorsInitializationError(error_msg) from e + raise StockIndicatorsInitializationError("Failed to import Stock Indicators types") from e
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📒 Files selected for processing (18)
.github/workflows/test-indicators.yml(2 hunks)stock_indicators/__init__.py(1 hunks)stock_indicators/_cslib/__init__.py(3 hunks)stock_indicators/_cstypes/decimal.py(3 hunks)stock_indicators/_cstypes/list.py(2 hunks)stock_indicators/exceptions.py(1 hunks)stock_indicators/indicators/alligator.py(1 hunks)stock_indicators/indicators/common/candles.py(3 hunks)stock_indicators/indicators/common/helpers.py(1 hunks)stock_indicators/indicators/common/quote.py(3 hunks)stock_indicators/indicators/common/results.py(3 hunks)stock_indicators/indicators/ema.py(1 hunks)stock_indicators/indicators/ichimoku.py(2 hunks)stock_indicators/indicators/macd.py(1 hunks)stock_indicators/indicators/sma.py(1 hunks)stock_indicators/indicators/stoch.py(1 hunks)stock_indicators/indicators/vwap.py(3 hunks)stock_indicators/indicators/wma.py(1 hunks)
🧰 Additional context used
🪛 GitHub Actions: Unit tests (CI)
stock_indicators/indicators/common/results.py
[error] 98-98: TypeError: 'staticmethod' object is not callable in add of IndicatorResults.
🪛 GitHub Check: Codacy Static Code Analysis
stock_indicators/indicators/vwap.py
[warning] 18-18: stock_indicators/indicators/vwap.py#L18
Keyword argument before variable positional arguments list in the definition of get_vwap function
[warning] 18-18: stock_indicators/indicators/vwap.py#L18
Too many branches (25/12)
[warning] 18-18: stock_indicators/indicators/vwap.py#L18
Too many statements (54/50)
[warning] 18-18: stock_indicators/indicators/vwap.py#L18
get_vwap is too complex (24) (MC0001)
🪛 Pylint (4.0.1)
stock_indicators/indicators/vwap.py
[refactor] 18-18: Too many branches (25/12)
(R0912)
[refactor] 18-18: Too many statements (54/50)
(R0915)
stock_indicators/indicators/ichimoku.py
[refactor] 24-24: Too many positional arguments (6/5)
(R0917)
🪛 Ruff (0.14.1)
stock_indicators/_cslib/__init__.py
35-35: Consider moving this statement to an else block
(TRY300)
41-41: Use explicit conversion flag
Replace with conversion flag
(RUF010)
55-55: Do not catch blind exception: Exception
(BLE001)
66-66: Abstract raise to an inner function
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66-66: Avoid specifying long messages outside the exception class
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72-72: Consider moving this statement to an else block
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stock_indicators/_cstypes/decimal.py
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stock_indicators/indicators/vwap.py
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stock_indicators/_cstypes/list.py
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stock_indicators/indicators/common/results.py
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stock_indicators/indicators/common/helpers.py
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stock_indicators/indicators/common/quote.py
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🔇 Additional comments (27)
stock_indicators/indicators/common/candles.py (4)
1-13: Imports look appropriate.Addition of
typing_extensions.override(line 3) is consistent with the decorator usage later in the file. All existing imports remain intact.
15-64: Pylint disable comments are well-justified.The
# pylint: disable=no-membercomments (lines 18, 23, 30, 38, 57, 62) are correctly placed where C# interop properties (self.High,self.Low,self.Open,self.Close) are accessed. Pylint cannot resolve these dynamically-provided members from pythonnet, so these narrow suppression comments are appropriate and necessary to maintain code quality checks elsewhere in the file. The explanatory text clarifies the reasoning.
94-99: Disable comment in CandleResult.candle property is appropriate.The comment on line 96 suppresses the no-member warning for accessing
self._csdata.Candle, which is a C# interop property. Consistent with the pattern used in_CandleProperties.
115-117: @OverRide decorator is properly applied.The
@overridedecorator on line 115 correctly marks thecondensemethod as intentionally overriding a parent method fromCondenseMixinorIndicatorResults, improving code clarity and enabling better IDE/linter support.stock_indicators/indicators/ichimoku.py (2)
13-23: Overload signatures correctly guide API usage.The overloads properly separate three usage patterns: default parameters, explicit offset_periods, and explicit senkou_offset/chikou_offset. The requirement for explicit period parameters in overloads 2 and 3 encourages clear API usage when customizing offsets, while the implementation maintains backward compatibility with defaults.
24-28: Function signature correctly implements keyword-only offset_periods.The signature properly places offset_periods after the
*,separator, making it keyword-only as intended. The pylint suppression for too-many-positional-arguments (6 vs. limit of 5) is appropriate and acknowledged.stock_indicators/indicators/macd.py (1)
42-42: LGTM: Legitimate pylint suppression for dynamic C# interop.The
no-membersuppression is appropriate here sinceQuote.usereturns a dynamic C# object whose members cannot be statically inferred by pylint. The inline comment clarifies the requirement to assign to a local variable..github/workflows/test-indicators.yml (1)
52-52: LGTM: Correct boolean comparison for matrix conditions.The updated syntax properly compares the boolean matrix value to
truerather than the string'true'. Bracket notationmatrix['post-summary']is also the correct way to access hyphenated property names in GitHub Actions expressions.Also applies to: 100-100
stock_indicators/_cstypes/list.py (2)
36-39: LGTM: Type hints and input validation improve API safety.The added type annotations clarify the expected inputs and return type. The iterable check on line 37-38 provides an early, clear error message for invalid inputs.
40-49: Good error handling and conversion strategy.Wrapping the conversion in a try/except block provides meaningful context when C# List creation fails. Using individual
Addcalls (line 45) is a good defensive choice given Python.NET's type conversion quirks withAddRange.stock_indicators/indicators/stoch.py (1)
11-13: LGTM: Legitimate suppression for multi-parameter function.The
too-many-positional-argumentssuppression is appropriate for this stochastic oscillator function, which requires multiple configuration parameters (lookback, signal, smooth, k/d factors, ma_type) that are domain-specific and cannot be easily reduced.stock_indicators/indicators/vwap.py (1)
18-20: LGTM: Flexible signature maintains backward compatibility.The signature effectively supports both modern (
get_vwap(quotes, datetime_obj)) and legacy (get_vwap(quotes, year, month, day, ...)) calling patterns. The pylint suppressions acknowledge the intentional complexity required for comprehensive parameter validation.stock_indicators/indicators/common/quote.py (4)
14-26: LGTM: Enhanced date handling with timezone normalization.The date property now includes proper type validation and timezone-aware datetime normalization to UTC (lines 24-25), aligning with the PR's objective to improve timezone support. The type hint on line 14 clarifies the return type.
29-84: Good type flexibility for OHLCV fields.The OHLCV setters accept
Optional[Union[int, float, Decimal, str]], providing flexibility for different numeric input formats while maintaining type safety. The conditional setting (e.g., line 36-37) correctly handles Python.NET nullable limitations explained in the inline comments.
96-127: LGTM: Robust initialization with proper nullable handling.The constructor validates the required
dateparameter (lines 113-114) and conditionally sets optional OHLCV fields (lines 118-127) to work around Python.NET nullable type constraints. The type annotations clearly document the flexible input types supported.
145-165: Good input validation and error handling.The
usemethod now validates inputs (lines 157-160) and wraps the C# interop call in a try/except (lines 162-165) to provide clear error context. This prevents cryptic failures when invalid inputs are passed to the underlying C# indicator calculations.stock_indicators/indicators/ema.py (1)
34-34: LGTM: Consistent pylint suppression pattern.The
no-membersuppression follows the same pattern as other indicator files (macd.py, wma.py) and is appropriate for the dynamic C# object returned byQuote.use.stock_indicators/indicators/wma.py (1)
36-36: LGTM: Consistent pylint suppression pattern.The
no-membersuppression is appropriate and follows the established pattern across indicator modules for handling dynamic C# interop objects.stock_indicators/__init__.py (1)
19-25: No issues found. Single authoritative definition verified.The class is defined once in
stock_indicators/exceptions.py:10, and_cslib/__init__.pycorrectly imports it on line 26. All six usages throughout_cslibreference the imported exception with no local duplicates.stock_indicators/indicators/common/results.py (8)
17-26: LGTM: Clean property implementation with proper type hints and validation.The date property now includes proper type annotations and a runtime type check in the setter, which improves API clarity and prevents invalid assignments.
38-45: LGTM: Proper empty data handling.The added empty data check prevents potential issues when initializing with empty results and ensures
_csdatais always properly initialized.
47-66: LGTM: Return type hints added to deprecated methods.The return type annotations improve API clarity. Since these methods are already deprecated, the implementation is appropriate.
68-72: LGTM: Good defensive check for empty results.The empty results check prevents IndexError and provides a clear error message.
98-102: LGTM: Good type validation in__add__(once staticmethod issue is fixed).The type check and error message improve the robustness of the concatenation operation. This will work correctly once the
@staticmethoddecorator is removed from_verify_data.
105-109: LGTM: Good type validation in__mul__(once staticmethod issue is fixed).The integer type check prevents invalid multiplication operations. This will work correctly once the
@staticmethoddecorator is removed from_verify_data.
112-123: LGTM: Enhanced validation and edge case handling.The added checks for negative values and the case where
remove_periods >= len(self)improve robustness. The return type hint clarifies the API.
125-145: LGTM: Past review feedback addressed.The comment now correctly describes the linear search implementation (previously incorrectly stated "binary search"). The two-tier search approach (date-only first, then exact datetime fallback) is pragmatic and well-documented.
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Signed-off-by: Dave Skender <8432125+DaveSkender@users.noreply.github.com>
DaveSkender
changed the title
DaveSkender
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copilot/fix-94a0641c-58a2-4e76-a48a-4af852c8cb35
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moved this from 👀 In review
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in Stock Indicators for Python
This PR comprehensively refactors the Python.NET wrapper implementation to follow best practices for .NET interoperability, with a major focus on timezone-aware datetime handling, enhanced type conversions, error handling, parameter validation, and performance improvements while maintaining full backward compatibility.
Key Improvements
Enhanced Timezone-Aware DateTime Handling
Robust Type Conversions & Validation
Advanced Error Handling
StockIndicatorsError,TypeConversionError,ValidationError, andIndicatorCalculationErrorfor better error categorizationMemory Management & Performance
reload()anddone()methods fromIndicatorResultsEnhanced Parameter Validation & Handling
VWAP Improvements
legacy_date_partsis a sequence with at most 4 itemsstartparameter is int (year), datetime, or NoneIchimoku Improvements
offset_periodsparameter: Function signature now accepts advertisedoffset_periodsparametersenkou_offsetandchikou_offsetwhen providedRecent Fixes
Code Quality Improvements
Testing
Breaking Changes
None - this refactor maintains full backward compatibility while providing significantly enhanced timezone support, better error handling, improved parameter validation, and improved performance.
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