如何在python中将未处理的字符串添加到DataFrame？

import pandas as pd

df = pd.DataFrame()

data = ['字符串1', '字符串2', '字符串3']

data = {'列名': ['字符串1', '字符串2', '字符串3']}

df['列名'] = data

import pandas as pd

df = pd.DataFrame()
data = ['字符串1', '字符串2', '字符串3']
df['列名'] = data

print(df)