如何在pandas数据帧中向某些列添加不带值的行

import pandas as pd

df = pd.DataFrame(columns=['Column1', 'Column2', 'Column3'])

new_row = pd.Series({}, name='New Row')
df = df.append(new_row)

df.loc['New Row', 'Column2'] = None

import pandas as pd

# 创建一个空的数据帧
df = pd.DataFrame(columns=['Column1', 'Column2', 'Column3'])

# 添加一个不带值的行
new_row = pd.Series({}, name='New Row')
df = df.append(new_row)

# 在特定列中添加不带值的行
df.loc['New Row', 'Column2'] = None

print(df)