pandas行中在零序列之前和之后的事件百分比

import pandas as pd

# 找到零值所在的位置
zero_indexes = df.index[df['列名'] == 0]

# 遍历零值的位置，计算百分比
for index in zero_indexes:
    # 零值之前的非零值数量
    count_before = df.loc[:index, '列名'].astype(bool).sum()
    # 零值之后的非零值数量
    count_after = df.loc[index:, '列名'].astype(bool).sum()
    # 零值之前的非零值所占的百分比
    percentage_before = count_before / (index + 1)
    # 零值之后的非零值所占的百分比
    percentage_after = count_after / (len(df) - index)
    print(f"在第{index}行之前的非零值百分比为：{percentage_before * 100}%")
    print(f"在第{index}行之后的非零值百分比为：{percentage_after * 100}%")