style: format code with black 26.1.0 and pin version in CI

Author: cloudQuant

.github/workflows/test.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Install linting tools
         run: |
           python -m pip install --upgrade pip
-          pip install ruff black isort
+          pip install ruff 'black==26.1.0' isort
 
       - name: Run ruff
         run: ruff check backtrader/

backtrader/__init__.py

@@ -45,6 +45,7 @@
     - Documentation: https://www.backtrader.com/docu/
     - GitHub: https://github.com/mementum/backtrader
 """
+
 # Load contributed indicators and studies
 from .indicators import contrib as _indicators_contrib
 

backtrader/analyzer.py

@@ -29,6 +29,7 @@
     ...     def get_analysis(self):
     ...         return {'trade_count': self.trades}
 """
+
 import calendar
 import datetime
 import pprint as pp

backtrader/analyzers/__init__.py

@@ -28,6 +28,7 @@
     >>> cerebro.addanalyzer(bt.analyzers.Sharpe, _name='sharpe')
     >>> cerebro.addanalyzer(bt.analyzers.DrawDown, _name='drawdown')
 """
+
 # The modules below should/must define __all__ with the objects wishes
 # or prepend an "_" (underscore) to private classes/variables
 

backtrader/analyzers/annualreturn.py

@@ -13,6 +13,7 @@
     >>> results = cerebro.run()
     >>> print(results[0].analyzers.annret.get_analysis())
 """
+
 from collections import OrderedDict
 
 from ..analyzer import Analyzer

backtrader/analyzers/calmar.py

@@ -13,6 +13,7 @@
     >>> results = cerebro.run()
     >>> print(results[0].analyzers.calmar.get_analysis())
 """
+
 import collections
 import math
 

backtrader/analyzers/drawdown.py

@@ -14,6 +14,7 @@
     >>> results = cerebro.run()
     >>> print(results[0].analyzers.dd.get_analysis())
 """
+
 from ..analyzer import Analyzer, TimeFrameAnalyzerBase
 from ..utils import AutoOrderedDict
 

backtrader/analyzers/leverage.py

@@ -13,6 +13,7 @@
     >>> results = cerebro.run()
     >>> print(results[0].analyzers.lev.get_analysis())
 """
+
 from ..analyzer import Analyzer
 
 

backtrader/analyzers/logreturnsrolling.py

@@ -11,6 +11,7 @@
     >>> cerebro = bt.Cerebro()
     >>> cerebro.addanalyzer(bt.analyzers.LogReturnsRolling)
 """
+
 import collections
 import math
 

backtrader/analyzers/periodstats.py

@@ -13,6 +13,7 @@
     >>> results = cerebro.run()
     >>> print(results[0].analyzers.stats.get_analysis())
 """
+
 from ..analyzer import Analyzer
 from ..dataseries import TimeFrame
 from ..mathsupport import average, standarddev