操作mysql数据库创建表&远程连接数据库

操作MySQL数据库
PyMySQL是在Python3.x版本中用于连接MySQL服务器的一个库，Python2中则使用mysqldb。

#coding=utf-8

import pymysql

#创建连接数据库对象
con=pymysql.connect(host='localhost',user='root',password='hdc@328216',database='my_test2',port=3306)

#创建游标
cur=con.cursor()

sql='''create table t_student(
    sid int primary key auto_increment,
    sname varchar(255),
    sage int,
    source float
)'''

try:
    #执行建表sql语句
    cur.execute(sql)
    print('建表成功')

except Exception as e:
    print(e)
    print('建表失败')
finally:
    cur.close()
    con.close()

ssh通道连接msyql

import pymysql
from configparser import ConfigParser
import os
import socket
import socks
import time
from sshtunnel import SSHTunnelForwarder

cf=ConfigParser(allow_no_value=True)
current_path=os.path.dirname(__file__)
root_path=os.path.dirname(current_path)
conffile_path=os.path.join(root_path+'/','config/conf.ini')
cf.read(conffile_path)
dbhost=cf.get("dbinfo","dbhost")
dbuser=cf.get("dbinfo","dbuser")
dbpasswd=cf.get("dbinfo","dbpasswd")
dbport=cf.get("dbinfo","dbport")
dbname=cf.get("dbinfo","dbname")


class MysqlUtils:
    def __init__(self):
        try:
            self.server = SSHTunnelForwarder(
                    ("18.183.69.64",22),                            #ssh通道跳转机的address，端口号
                    ssh_username="ubuntu",                          #ssh通道跳转机的用户名
                    ssh_pkey="C:/Users/chawey/.ssh/id_rsa_53",      #私钥路径
                    remote_bind_address=(dbhost,3306),              #mysql服务器的address，端口号
                    local_bind_address=("127.0.0.1",13306))         #将远程数据库的端口号绑定成本机的某个端口号，这里暂定为13306
            self.server.start()
            self.conn = pymysql.connect(
                    host="127.0.0.1",
                    port=13306,
                    user=dbuser,
                    password=dbpasswd,
                    database=dbname
                )
            self.cursor = self.conn.cursor(cursor=pymysql.cursors.DictCursor)

            # self.con=pymysql.connect(host=dbhost,user=dbuser,password=dbpasswd,port=int(dbport),database=dbname)
            # self.cursor=self.con.cursor(cursor=pymysql.cursors.DictCursor)
        except Exception as e:
            print('数据库连接失败',e)
            
        
    #查询数据
    def select(self,sql):
        try:
            self.cursor.execute(sql)
            result = self.cursor.fetchall()
            self.close()
            self.server.close()                       #执行完sql要确定关闭服务
        except Exception as e:
            print('查询数据失败',e)
        return result
        
if __name__ == '__main__':
    sql="select * from user_currency_flow where flow_type=6 and biz_no='CONvZzHGVi' order by id desc;"
    result=MysqlUtils().select(sql)
    print(result[0].get("quantity"))


或者：
def __init__(self):
    try:
        self.server = SSHTunnelForwarder(
            ("18.183.69.64", 22),                           # ssh通道跳转机的address，端口号
            ssh_username="ubuntu",                          # ssh通道跳转机的用户名
            ssh_pkey="C:/Users/chawey/.ssh/id_rsa_53",      # 私钥路径
            remote_bind_address=(dbhost, 3306))             # mysql服务器的address，端口号
            #local_bind_address=("127.0.0.1", 13306))       # 将远程数据库的端口号绑定成本机的某个端口号，这里暂定为13306
        self.server.start()
        self.conn = pymysql.connect(
                host="127.0.0.1",
                #port=3306,
                port=self.server.local_bind_port,           #使用server绑定的端口
                user=dbuser,
                password=dbpasswd,
                database=dbname
            )
        self.cursor = self.conn.cursor(cursor=pymysql.cursors.DictCursor)