Compare Percent Change values inside a for loop - python-3.x

Question

I have a list like below
I want to be able to compare the percent change of QQQ at 9:35 to various other stocks like AAPL and AMD at the same time. So check if percent change of AAPL at 9:35 is greater than percent change of QQQ at 9:35. Same thing for AMD at 9:35 and then at 9:40 and then 9:45 and so on.
I want to do this via python
This is what i have so far but not quite correct
import pandas as pd
import time
import yfinance as yf
import datetime as dt
from pandas_datareader import data as pdr
from collections import Counter
from tkinter import Tk
from tkinter.filedialog import askopenfilename
import os
from pandas import ExcelWriter
d1 = dt.datetime(2020, 8, 5,9,00,00)
d2 = dt.datetime(2020, 8, 5,16,00,00)
pc=Counter()
filePath=r"C:\Users\Adil\Documents\Python Test - ET\Data\Trail.xlsx"
stocklist = pd.read_excel(filePath)
for i in stocklist.index:
symbol=stocklist['Symbol'][i]
date=stocklist['Date'][i]
close=stocklist['Close'][i]
pc=stocklist['PercentChange'][i]
if (pc[i]>pc['QQQ']):
print(pc[i])

Answer 1

Alright,
I got from a comment, an explanation of what the OP wants:
Yes so i want to see if within a given time 5 min time period if a
stock performed better than QQQ
First thing you need to do, is make it so you can look up your information by the time and symbol. Here is how I would do that:
my_data = {}
for i in stocklist.index:
symbol=stocklist['Symbol'][i]
date=stocklist['Date'][i]
pc=stocklist['PercentChange'][i]
my_data[symbol, date] = pc
That makes a dictionary where you can lookup percent changes by calling my_data['ABCD', 'datetime']
Then, I would make a list of all the times.
time_set = set()
for i in stocklist.index:
date = stocklist['Date'][i]
time_set.add(date)
times = list(time_set)
times.sort()
If you are pressed for computer resources, you could combine those two loops and run them together, but I think having them separate makes the code easier to understand.
And then do the same thing for symbols:
sym_set = set()
for i in stocklist.index:
date = stocklist['Symbol'][i]
sym_set.add(date)
symbols = list(sym_set)
symbols.sort()
Once again, you could have made this set during the first for-loop, but this way you can see what we are trying to accomplish a bit better.
Last thing to do, is actually make the comparisons:
for i in times:
qs = my_data['QQQ', i]
for j in symbols:
if qs != 'QQQ':
which = "better" if my_data[j, i]>qs else "worse"
print(j + " did " + which + " than QQQ at " + i)
Now, this just prints the information out to the console, you should replace the print command with however you want to output it. (Also, I assumed higher was better; I hope that was right.)