设计模式之结构型模式---代理模式

import pandas as pd
#intial
t = [0,0,0,0,0,0,0,0]
#read file
data = pd.read_excel(r'formation_velocity_depth.xlsx')
#get random column
data1 = data['velocity']
data2 = data['well16'] 
data1 = list(data1)
data2 = list(data2)
length1 = len(data1)
length2 = len(data2)

for i in range(length2):
    for k in range(i):
        t[i] =  t[i] + 2*(data2[k+1] - data2[k])/data1[k+1]
dataframe = pd.DataFrame({'T0(two way)':t})
#save DataFrame as form of csv,index is showing rows(Y/N) ，default=True
dataframe.to_csv("depth_to_time.csv",index=False)