python中一列的前三个最大值 [英] The first three max value in a column in python

问题描述

我是 Python 新手.我想知道如何在 Python 中提取列的前三个值.我使用了 CSV 文件.这是我的代码:

I am new in Python. I would like to know how should I extract the first three value of a column in Python. I used CSV file. Here is my code:

import pandas as pd
census_df = pd.read_csv('census.csv')

def answer_five():

    return census_df['COUNTY'].idxmax(3)

answer_five() 

推荐答案

你想要

# get first three
census_df['COUNTY'].head(3)

或

# get largest three
census_df['COUNTY'].nlargest(3)

如果您想要具有 3 个最大 COUNTY 值的记录

if you want the records with the 3 largest COUNTY values

census_df.iloc[census_df['COUNTY'].argsort()[-3:]]

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