为所有名称如下的列添加相同的行值到dataframe

import pandas as pd

# 创建一个空的dataframe对象
df = pd.DataFrame()

# 添加列到dataframe
df['column1'] = [value1, value2, value3, ...]
df['column2'] = [value1, value2, value3, ...]
df['column3'] = [value1, value2, value3, ...]

import pandas as pd

# 创建一个空的dataframe对象
df = pd.DataFrame()

# 定义要添加的行值
value = 10

# 添加列到dataframe
columns = ['column1', 'column2', 'column3']
for column in columns:
    df[column] = [value] * len(df.index)