当我只需要文件中的几个数据点时，如何对非常大的 csv excel 文件中的排名值进行排名？

Question

I uploaded an incredibly large Excel file as such

import pandas as pd
import matplotlib.pyplot as plt

df = pd.read_csv("C:\\Users\\willi\\Downloads\\Formatted Corona Virus Data.csv")

index = ['ARG', 'BOL', 'CHL', 'COL', 'CRI', 'CUB', 'ECU', 'PAN', 'PER', 'PRY']

and it looks like the image below obviously it continues on to more countries

how do I create a list to compare and rank these 10 countries from the index for total cases from the most recent date from most to least?

*edit some of them may have different most recent dates

Answer 1

How about

df[df.iso_code.isin(index)].groupby(['index','date']).total_cases.rank() ?