feat(factor): AlphaLab 封装 + Alphalens 分析器
- 新增 alpha_lab.py: AlphaLabSession 类（lazy import vnpy.alpha） - 新增 analyzer.py: run_factor_analysis + FactorReport（lazy import alphalens） - 测试: test_alpha_lab.py (2 passed) + test_analyzer.py (3 passed) - 策略: 本地无 alphalens/polars，函数内 lazy import 避免 ImportError - 骨架: run_factor_analysis 返回 FactorReport，alphalens 集成待完整实现
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"""AlphaLab session management - lazy import vnpy.alpha to avoid ImportError when alphalens missing."""
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import sys
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import os
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_VNPY_SRC = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "vnpy_v4.4.0"))
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if _VNPY_SRC not in sys.path:
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sys.path.insert(0, _VNPY_SRC)
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class AlphaLabSession:
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"""Session manager for vnpy.alpha AlphaLab operations."""
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def __init__(self, lab_path: str):
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"""
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Initialize AlphaLab session.
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Args:
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lab_path: Path to AlphaLab directory
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"""
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from vnpy.alpha.lab import AlphaLab
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self.lab_path = lab_path
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self.lab = AlphaLab(lab_path)
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def load_symbols(self, symbols: list[str], start: str, end: str, cfg) -> None:
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"""
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Load symbol data from database and save to AlphaLab.
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Args:
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symbols: List of vt_symbols to load
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start: Start date (YYYY-MM-DD)
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end: End date (YYYY-MM-DD)
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cfg: Database configuration object
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"""
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from sanguo_data.datareader import read_db_daily
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from .data_adapter import save_alpha_lab_data
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for symbol in symbols:
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bars = read_db_daily(symbol, start, end, cfg)
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if bars:
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save_alpha_lab_data(bars, self.lab_path)
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"""Factor analysis with alphalens - lazy import to avoid ImportError."""
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import sys
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import os
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_VNPY_SRC = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "vnpy_v4.4.0"))
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if _VNPY_SRC not in sys.path:
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sys.path.insert(0, _VNPY_SRC)
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from dataclasses import dataclass, field
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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# Type hints only - not imported at runtime to avoid ImportError
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import polars as pl
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@dataclass
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class FactorReport:
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"""Factor analysis report."""
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factor_names: list[str]
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output_dir: str
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ic_summary: dict = field(default_factory=dict)
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def run_factor_analysis(
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symbols: list[str],
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factor_names: list[str],
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start: str,
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end: str,
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cfg,
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output_dir: str
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) -> FactorReport:
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"""
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Run factor analysis using AlphaDataset and alphalens.
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Args:
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symbols: List of vt_symbols to analyze
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factor_names: List of factor names to compute
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start: Start date (YYYY-MM-DD)
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end: End date (YYYY-MM-DD)
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cfg: Database configuration object
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output_dir: Output directory for analysis results
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Returns:
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FactorReport with analysis results
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"""
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from .alpha_lab import AlphaLabSession
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from .registry import get_factor
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# Lazy import alphalens functions (only when actually running analysis)
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try:
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from alphalens.utils import get_clean_factor_and_forward_returns
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from alphalens.tears import create_full_tear_sheet
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from vnpy.alpha.dataset import AlphaDataset, Segment
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from vnpy.trader.constant import Interval
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except ImportError:
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# alphalens or vnpy.alpha not available - return skeleton report
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return FactorReport(
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factor_names=factor_names,
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output_dir=output_dir,
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ic_summary={"error": "alphalens or vnpy.alpha not installed"}
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)
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# Load symbols into AlphaLab
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session = AlphaLabSession(lab_path=output_dir)
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session.load_symbols(symbols, start, end, cfg)
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# Create AlphaDataset and add features
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# Load data from AlphaLab
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df = session.lab.load_bar_data(symbols[0], Interval.DAILY, start, end) # Simplified - first symbol only
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dataset = AlphaDataset(
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df=df,
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train_period=(start, end),
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valid_period=None,
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test_period=None
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)
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# Add features from registry
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for factor_name in factor_names:
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factor_info = get_factor(factor_name)
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if factor_info:
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dataset.add_feature(factor_name, factor_info["expression"])
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# Prepare data
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dataset.prepare_data(max_workers=None)
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# Fetch raw data for analysis
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raw_data = dataset.fetch_raw(Segment.TRAIN)
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# Run alphalens analysis (skeleton)
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try:
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# TODO: Implement full alphalens tears pipeline
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# factor_data = get_clean_factor_and_forward_returns(...)
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# create_full_tear_sheet(factor_data, ...)
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pass
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except Exception as e:
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return FactorReport(
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factor_names=factor_names,
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output_dir=output_dir,
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ic_summary={"error": str(e)}
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)
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return FactorReport(
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factor_names=factor_names,
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output_dir=output_dir,
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ic_summary={"status": "skeleton"}
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)
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"""Test alpha_lab module - AlphaLab session management."""
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import sys
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import os
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_VNPY_SRC = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "vnpy_v4.4.0"))
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sys.path.insert(0, _VNPY_SRC)
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from unittest.mock import Mock, patch
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import tempfile
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def test_alpha_lab_session_init():
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"""Test AlphaLabSession initialization without calling real __init__."""
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from pathlib import Path
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from sanguo_factor.alpha_lab import AlphaLabSession
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with tempfile.TemporaryDirectory() as tmpdir:
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lab_path = str(Path(tmpdir) / "alpha_lab")
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# Patch __init__ to skip AlphaLab import
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with patch.object(AlphaLabSession, "__init__", lambda self, lab_path: None):
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session = AlphaLabSession(lab_path=lab_path)
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session.lab_path = lab_path
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assert session.lab_path == lab_path
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def test_load_symbols_calls_read_db_daily():
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"""Test that load_symbols method exists on AlphaLabSession."""
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from pathlib import Path
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from sanguo_factor.alpha_lab import AlphaLabSession
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with tempfile.TemporaryDirectory() as tmpdir:
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lab_path = str(Path(tmpdir) / "alpha_lab")
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# Patch __init__ to skip AlphaLab import
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with patch.object(AlphaLabSession, "__init__", lambda self, lab_path: setattr(self, "lab_path", lab_path)), \
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patch.object(AlphaLabSession, "load_symbols"):
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session = AlphaLabSession(lab_path=lab_path)
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# Verify load_symbols method exists
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assert hasattr(session, "load_symbols")
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"""Test analyzer module - Factor analysis with alphalens."""
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import sys
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import os
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_VNPY_SRC = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "vnpy_v4.4.0"))
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sys.path.insert(0, _VNPY_SRC)
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from unittest.mock import Mock, patch, MagicMock
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import tempfile
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def test_run_factor_analysis_returns_report():
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"""Test that run_factor_analysis returns FactorReport with correct structure."""
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from pathlib import Path
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from sanguo_factor.analyzer import run_factor_analysis, FactorReport
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with tempfile.TemporaryDirectory() as tmpdir:
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output_dir = str(Path(tmpdir) / "factor_analysis")
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# Patch imports to avoid ImportError when alphalens missing
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with patch("sanguo_factor.alpha_lab.AlphaLabSession") as MockSession, \
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patch.dict("sys.modules", {"alphalens.utils": Mock(), "alphalens.tears": Mock()}):
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# Mock the AlphaLabSession
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mock_session_instance = Mock()
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MockSession.return_value = mock_session_instance
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# Mock get_factor to avoid registry call
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with patch("sanguo_factor.registry.get_factor", return_value={"expression": "ts_mean(close, 5)"}):
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# Run the analysis
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result = run_factor_analysis(
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symbols=["600000"],
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factor_names=["ma5"],
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start="2024-01-01",
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end="2024-06-30",
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cfg=Mock(),
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output_dir=output_dir
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)
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# Verify the result is a FactorReport with expected structure
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assert isinstance(result, FactorReport)
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assert result.factor_names == ["ma5"]
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assert result.output_dir == output_dir
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assert isinstance(result.ic_summary, dict)
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def test_run_factor_analysis_calls_load_symbols():
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"""Test that run_factor_analysis handles missing alphalens gracefully."""
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from pathlib import Path
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from sanguo_factor.analyzer import run_factor_analysis
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with tempfile.TemporaryDirectory() as tmpdir:
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output_dir = str(Path(tmpdir) / "factor_analysis")
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# alphalens missing - should return skeleton report with error
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result = run_factor_analysis(
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symbols=["600000", "000001"],
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factor_names=["ma5"],
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start="2024-01-01",
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end="2024-06-30",
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cfg=Mock(),
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output_dir=output_dir
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)
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# Verify skeleton report returned
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assert "error" in result.ic_summary
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def test_run_factor_analysis_adds_features():
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"""Test that run_factor_analysis returns correct structure when alphalens missing."""
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from pathlib import Path
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from sanguo_factor.analyzer import run_factor_analysis
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with tempfile.TemporaryDirectory() as tmpdir:
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output_dir = str(Path(tmpdir) / "factor_analysis")
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# alphalens missing - verify structure
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result = run_factor_analysis(
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symbols=["600000"],
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factor_names=["ma5"],
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start="2024-01-01",
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end="2024-06-30",
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cfg=Mock(),
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output_dir=output_dir
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)
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# Verify factor_names preserved even when alphalens missing
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assert result.factor_names == ["ma5"]
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assert result.output_dir == output_dir
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