pandas 给dataframe添加列名的两种方法_python

import pandas as pd
import numpy as np

df1 = pd.DataFrame(np.random.randn(3, 3), index=list('abc'), columns=list('ABC'))
print(df1)

import numpy as np
import pandas as pd

#创建一个Dataframe
data=pd.DataFrame(np.arange(16).reshape(4,4))

data.columns=["列名1","列名2","列名3","列名4"]
data.index=["a","b","c","d"]
print("data=\n", data)