python dataframe函数
主要是介绍dataframe和python常数常用的
from cmath import isnan
from typing import List
import requests,json,pandas as pd,time,numpy as np,pymysql,os,configparser,datetime,re,random
from sqlalchemy import create_engine
from lxml import etree
from requests.adapters import HTTPAdapter
from queue import Queue
from difflib import SequenceMatcher
合并,将两个dataframe进行合并相当于sql中的表连接(left join ,inner join ,right join等)
df = pd.merge(df1, df2, how='left', on=['id'])
ps : pd.merge 函数名字
Original: https://blog.csdn.net/weixin_43681796/article/details/118469569
Author: 花掏尽
Title: python dataframe 和 函数
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