检查并更改dataframe中的每个单元格

import pandas as pd

df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]})

for index, row in df.iterrows():
    for col in df.columns:
        cell_value = df.loc[index, col]
        # 进行相应的检查和更改操作

df.loc[index, col] = new_value

import pandas as pd

df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]})

for index, row in df.iterrows():
    for col in df.columns:
        cell_value = df.loc[index, col]
        # 进行相应的检查和更改操作
        # 示例：将大于5的值修改为10
        if cell_value > 5:
            df.loc[index, col] = 10

print(df)