写出卡方分箱的Python代码

卡方分箱是一种常用的有监督分箱方法。下面是一个简单的Python代码示例，用于实现卡方分箱：

import pandas as pd
import numpy as np
from scipy.stats import chi2_contingency

def chi2_binning(data, variable, target, max_bins):
    data = data[[variable, target]].copy()
    data['bucket'] = pd.qcut(data < agg_data['chi2_value'].iloc[min_chi2_index + 1]:
                merge_index = min_chi2_index - 1
            else:
                merge_index = min_chi2_index + 1
        
        merged_bucket = agg_data['bucket'].iloc[min_chi2_index + agg_data['bucket'].iloc + agg_data['count'].iloc + agg_data['event'].iloc + agg_data['non_event'].iloc + agg_data['chi2_value'].iloc + agg_data['p_value'].iloc<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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