Traceback (most recent call last):
  File "/Users/xxz/miniforge3/envs/crypto_pred_312/lib/python3.12/site-packages/pandas/core/indexes/base.py", line 3641, in get_loc
    return self._engine.get_loc(casted_key)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "pandas/_libs/index.pyx", line 168, in pandas._libs.index.IndexEngine.get_loc
  File "pandas/_libs/index.pyx", line 197, in pandas._libs.index.IndexEngine.get_loc
  File "pandas/_libs/hashtable_class_helper.pxi", line 7668, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas/_libs/hashtable_class_helper.pxi", line 7676, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'BBU_20_2.0'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/xxz/PycharmProjects/crypto_predictor/train_dlinear_real.py", line 163, in <module>
    main()
  File "/Users/xxz/PycharmProjects/crypto_predictor/train_dlinear_real.py", line 30, in main
    X, y, processed_df = preprocessor.preprocess_pipeline(df, task='classification', fit=True)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/xxz/PycharmProjects/crypto_predictor/data/preprocessor.py", line 225, in preprocess_pipeline
    df = self.add_technical_indicators(df)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/xxz/PycharmProjects/crypto_predictor/data/preprocessor.py", line 58, in add_technical_indicators
    df['bb_upper'] = bbands['BBU_20_2.0']
                     ~~~~~~^^^^^^^^^^^^^^
  File "/Users/xxz/miniforge3/envs/crypto_pred_312/lib/python3.12/site-packages/pandas/core/frame.py", line 4378, in __getitem__
    indexer = self.columns.get_loc(key)
              ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/xxz/miniforge3/envs/crypto_pred_312/lib/python3.12/site-packages/pandas/core/indexes/base.py", line 3648, in get_loc
    raise KeyError(key) from err
KeyError: 'BBU_20_2.0'

ERROR conda.cli.main_run:execute(127): `conda run python train_dlinear_real.py` failed. (See above for error)
================================================================================
DLinear模型训练 - 真实Binance数据
================================================================================

[1/7] 从Binance获取BTC 1h真实数据...
✓ 使用SOCKS5代理: socks5://127.0.0.1:7890
✓ 已成功连接到Binance API
从缓存加载数据：data/cache/BTC_1h_1y_now.csv
✓ 已获取 8760 行真实数据
✓ 时间范围：2025-01-28 15:00:00 至 2026-01-28 14:00:00

[2/7] 数据预处理（技术指标 + 特征工程）...