pandas 与csv 的写入与读取

import numpy as np
import pandas as pd


a1=[]
for q in range(10):
    ar1=[q,q+1,q+2,q+3]
    a1.append(ar1)
 
n1=np.array(a1)
df1 = pd.DataFrame(n1,columns=["t1","t2","t3","t4"],index=range(1,11))
#df1.to_json("data/1.json")
df1.to_csv("data/1.csv")

df2=pd.read_csv("data/1.csv",index_col=0)
print(df1)
print(df2)