Python 3はmysql接続とデータボックスの形成を実現します（例コード）

# -*- coding:utf-8 -*-
# __author__ = "LQ"
import pymysql
import pandas as pd
import numpy as np
from sklearn import preprocessing
#       
def dbcconnect():
  conn = pymysql.connect(host='ip', port=3306, user='username', passwd='password',db='db')
  return conn
#  sql      
def selects(sql):
  conn=dbcconnect()
  cursor = conn.cursor()
  cursor.execute(sql)
  #           
  results = cursor.fetchall()
  conn.commit()
  cursor.close()
  return results
#  sql     
def selectDf(sql):
  conn=dbcconnect()
  cursor = conn.cursor()
  cursor.execute(sql)
  #           
  results = cursor.fetchall()
  #     
  cols = [i[0] for i in cursor.description]
  # sql    pandas DF
  df = pd.DataFrame(np.array(results), columns=cols).astype(float)
  conn.commit()
  cursor.close()
  return df