Python data analysis actual combat - dataframe grouping (for a certain column) summation (with source code and implementation effect)

Realize function

Python data analysis actual combat - dataframe grouping (summing a certain column)

1、df.groupby()[].sum().to_frame().reset_index()

2、df.columns=[]

Implementation code

import pandas as pd

# 读取数据
data=pd.read_csv('E:\数据杂坛\\UCI Heart Disease Dataset.csv')
df=pd.DataFrame(data)
print(df.head())

# 按target分组求和(对所有列求和)
df1=df.groupby('target').sum().reset_index()
print(df1)

# 按target分组求和(只对age求和)
df2=df.groupby('target')['age'].sum().reset_index()
print(df2)

achieve effect

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