数学建模处理数据

import pandas as pd
import numpy as np
d1 = []
df4 = []
a = []
b = []
i = 0
data = pd.read_excel('jijin.xlsx', header=0)
d5 = data['NAV']
with open('sharp.txt','r') as f:
    lines = f.readlines()

def statistics(f,ord,data):
    s = f
    x = ord
    while f == s:
        if ord == len(data['Symbol']):