Extract .last_result.json to constant

freqtrade/constants.py

@@ -33,6 +33,8 @@ DEFAULT_DATAFRAME_COLUMNS = ['date', 'open', 'high', 'low', 'close', 'volume']
 # it has wide consequences for stored trades files
 DEFAULT_TRADES_COLUMNS = ['timestamp', 'id', 'type', 'side', 'price', 'amount', 'cost']
 
+LAST_BT_RESULT_FN = '.last_result.json'
+
 USERPATH_HYPEROPTS = 'hyperopts'
 USERPATH_STRATEGIES = 'strategies'
 USERPATH_NOTEBOOKS = 'notebooks'

freqtrade/data/btanalysis.py

@@ -10,6 +10,7 @@ import pandas as pd
 from datetime import timezone
 
 from freqtrade import persistence
+from freqtrade.constants import LAST_BT_RESULT_FN
 from freqtrade.misc import json_load
 from freqtrade.persistence import Trade
 
@@ -34,7 +35,7 @@ def get_latest_backtest_filename(directory: Union[Path, str]) -> str:
         directory = Path(directory)
     if not directory.is_dir():
         raise ValueError(f"Directory '{directory}' does not exist.")
-    filename = directory / '.last_result.json'
+    filename = directory / LAST_BT_RESULT_FN
 
     if not filename.is_file():
         raise ValueError(f"Directory '{directory}' does not seem to contain backtest statistics yet.")
@@ -43,7 +44,7 @@ def get_latest_backtest_filename(directory: Union[Path, str]) -> str:
         data = json_load(file)
 
     if 'latest_backtest' not in data:
-        raise ValueError("Invalid '.last_result.json' format.")
+        raise ValueError(f"Invalid '{LAST_BT_RESULT_FN}' format.")
 
     return data['latest_backtest']
 

freqtrade/optimize/optimize_reports.py

@@ -7,7 +7,7 @@ from arrow import Arrow
 from pandas import DataFrame
 from tabulate import tabulate
 
-from freqtrade.constants import DATETIME_PRINT_FORMAT
+from freqtrade.constants import DATETIME_PRINT_FORMAT, LAST_BT_RESULT_FN
 from freqtrade.data.btanalysis import calculate_max_drawdown, calculate_market_change
 from freqtrade.misc import file_dump_json
 
@@ -21,8 +21,7 @@ def store_backtest_stats(recordfilename: Path, stats: Dict[str, DataFrame]) -> N
                              ).with_suffix(recordfilename.suffix)
     file_dump_json(filename, stats)
 
-    latest_filename = Path.joinpath(recordfilename.parent,
-                                    '.last_result.json')
+    latest_filename = Path.joinpath(recordfilename.parent, LAST_BT_RESULT_FN)
     file_dump_json(latest_filename, {'latest_backtest': str(filename.name)})