chore: minor improvements

freqtrade/data/btanalysis/trade_parallelism.py

@@ -103,5 +103,6 @@ def balance_distribution_over_time(
                 df.loc[filled_at:end_date, trade.pair] -= real_amount
                 df.loc[filled_at:, stake_currency] += stake - fee
 
+    # Round to avoid floating point issues
     df = df.round(14)
     return df

freqtrade/optimize/optimize_reports/optimize_reports.py

@@ -36,7 +36,7 @@ def convert_bt_wallet_collection(wallet_captures: list[tuple]) -> DataFrame:
     (date, currency, price, balance).
     """
     if len(wallet_captures) == 0:
-        return []
+        return DataFrame()
     return DataFrame(
         wallet_captures,
         columns=["date", "currency", "price", "balance"],

freqtrade/util/migrations/migrate_wallet_history.py

@@ -109,7 +109,7 @@ def _migrate_wallet_history(config: Config, exchange: Exchange, starting_balance
             WalletHistory.session.bulk_save_objects(wallet_entries)
             WalletHistory.session.commit()
             KeyValueStore.store_value("wallet_history_migration_date", dt_now())
-            print(f"Successfully created {len(wallet_entries)} wallet balance records")
+            logger.info(f"Successfully created {len(wallet_entries)} wallet balance records")
         except Exception as e:
             WalletHistory.session.rollback()
-            print(f"Error saving wallet balance records: {e}")
+            logger.error(f"Error saving wallet balance records: {e}")