根据Pandas中的条件，将多行的值替换为另一行的值

import pandas as pd

data = {'A': [1, 2, 3, 4, 5],
        'B': [6, 7, 8, 9, 10],
        'C': [11, 12, 13, 14, 15]}
df = pd.DataFrame(data)

condition = (df['A'] > 2)  # 设置条件，例如'A'列的值大于2
replacement = df.loc[0]  # 设置替换值，例如将第一行的值作为替换值

df.loc[condition] = replacement

import pandas as pd

data = {'A': [1, 2, 3, 4, 5],
        'B': [6, 7, 8, 9, 10],
        'C': [11, 12, 13, 14, 15]}
df = pd.DataFrame(data)

condition = (df['A'] > 2)
replacement = df.loc[0]

df.loc[condition] = replacement