class TanhProcess(Processor) error

🐛 Bug Description

data.columns.get_level_values(1).str.contains("LABEL") is weird.
data.columns.get_level_values(1) will never contain LABEL, but data.columns.get_level_values(0) will.
if you want filter label, why do not use fields_group params?

class TanhProcess(Processor):
"""Use tanh to process noise data"""

def __call__(self, df):
    def tanh_denoise(data):
        mask = data.columns.get_level_values(1).str.contains("LABEL")
        col = df.columns[~mask]
        data[col] = data[col] - 1
        data[col] = np.tanh(data[col])

        return data

    return tanh_denoise(df)

To Reproduce

Steps to reproduce the behavior:

Expected Behavior

Screenshot

Environment

Note: User could run cd scripts && python collect_info.py all under project directory to get system information
and paste them here directly.

• Qlib version:
• Python version:
• OS (Windows, Linux, MacOS):
• Commit number (optional, please provide it if you are using the dev version):

Additional Notes

Start by locating the TanhProcess implementation and inspect how its pandas column levels and fields_group parameters are defined. Reproduce the reported LABEL filtering behavior with the provided class and a representative DataFrame, then confirm the intended label-column selection with a focused test or documented reproduction.