python之day13(ORM,paramiko模块,堡垒机)

一、ORM
   
   连表
      一对多
      
      1、创建表，主动指定外键约束

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, ForeignKey, UniqueConstraint, Index,Table
from sqlalchemy.orm import sessionmaker, relationship
engine = create_engine("mysql+pymysql://root:123@127.0.0.1:3306/s13", max_overflow=5)

Base = declarative_base()
# 单表
class Test(Base):
    __tablename__ = 'test'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    name = Column(String(32))
# 一对多
class Group(Base):
    __tablename__ = 'group'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    caption = Column(String(32))

class User(Base):
    __tablename__ = 'user'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    username = Column(String(32))
    group_id = Column(Integer, ForeignKey('group.nid'))
    group = relationship("Group", backref='uuu')

    def __repr__(self):
        temp = "%s - %s: %s" %(self.nid, self.username, self.group_id)
        return temp

2、操作

            类：repr

class User(Base):
    __tablename__ = 'user'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    username = Column(String(32))
    group_id = Column(Integer, ForeignKey('group.nid'))
    group = relationship("Group", backref='uuu')

    def __repr__(self):
        temp = "%s - %s: %s" %(self.nid, self.username, self.group_id)
        return temp

　　　　　　　单表

Session = sessionmaker(bind=engine)
session = Session()

session.add_all([
    Host(hostname='c1',port='22',ip='1.1.1.1'),
    Host(hostname='c2',port='22',ip='1.1.1.2'),
    Host(hostname='c3',port='22',ip='1.1.1.3'),
    Host(hostname='c4',port='22',ip='1.1.1.4'),
    Host(hostname='c5',port='22',ip='1.1.1.5'),
])
session.commit()

　　　　　　   连表

               session.query(表1).join(表2).all()

ret = session.query(User.username).all()
print(ret)
sql = session.query(User,Group).join(Group, isouter=True)
print(sql)
ret = session.query(User,Group).join(Group, isouter=True).all()
print(ret)
sql = session.query(User.username,Group.caption).join(Group, isouter=True)
print(sql)
ret = session.query(User.username,Group.caption).join(Group, isouter=True).all()
print(ret)
select * from user left join group on user.group_id = group.nid

      
      
      多对多
         1、创建表，额外的关系表

         2、filter()
               ==
               in_（ 都可以是另外一个查询）
         3、relationship
         
            A
            AB ==> fk, 关系
            B

class Test(Base):
    __tablename__ = "test"
    nid = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String(32))

class Group(Base):
    __tablename__ = "group"
    nid = Column(Integer, primary_key=True, autoincrement=True)
    caption = Column(String(32))

class User(Base):
    __tablename__ = "user"
    nid = Column(Integer,primary_key=True,autoincrement=True)
    username = Column(String(32))
    group_id = Column(Integer, ForeignKey("group.nid"))
    group = relationship("Group", backref="uuu")                     #查询时使用，与外键一起使用 “Group” 类名（表），uuu是反向

    def __repr__(self):
        temp = "%s - %s: %s" %(self.nid, self.username, self.group_id)
        return temp


Session = sessionmaker(bind=engine)
session = Session()

#正向查询
ret = session.query(User).all()
for obj in ret:
    print(obj.nid, obj.username, obj.group_id, obj.group.nid,obj.group.caption)



#反向查询
obj = session.query(Group).filter(Group.caption == "DBA").first()
print(obj.nid)
print(obj.caption)
print(obj.uuu)

         4、简单
            
            A   关系(B,ABTable对象)
            AB ==>fk, 
            B
            操作时，简单

class HostToHostUser(Base):
    __tablename__ = 'host_to_host_user'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    host_id = Column(Integer,ForeignKey('host.nid'))
    host_user_id = Column(Integer,ForeignKey('host_user.nid'))
    # host = relationship("Host", backref='h')
    # host_user = relationship("HostUser", backref='u')

    def __repr__(self):
        temp = "%s - %s: %s" %(self.nid, self.username, self.group_id)
        return temp

class Host(Base):
    __tablename__ = 'host'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    hostname = Column(String(32))
    port = Column(String(32))
    ip = Column(String(32))
    host_user = relationship("HostUser", secondary=HostToHostUser.__table__,backref='h')

class HostUser(Base):
    __tablename__ = 'host_user'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    username = Column(String(32))

class Host(Base):
    __tablename__ = 'host'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    hostname = Column(String(32))
    port = Column(String(32))
    ip = Column(String(32))
    host_user = relationship("HostUser", secondary=lambda :HostToHostUser.__table__,backref='h')

class HostUser(Base):
    __tablename__ = 'host_user'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    username = Column(String(32))

class HostToHostUser(Base):
    __tablename__ = 'host_to_host_user'
    nid = Column(Integer, primary_key=True,autoincrement=True)
    host_id = Column(Integer,ForeignKey('host.nid'))
    host_user_id = Column(Integer,ForeignKey('host_user.nid'))
    # host = relationship("Host", backref='h')
    # host_user = relationship("HostUser", backref='u')

    def __repr__(self):
        temp = "%s - %s: %s" %(self.nid, self.username, self.group_id)
        return temp

         
            Table对象：
               
               A   关系(B,Table对象方法)
               Table对象方法 AB ==>fk, 
               B
               操作时，简单
         
         
            
               A   关系(B,AB.__table__)
               AB ==>fk, 
               B
               操作时，简单
      

sqlachemy回顾：   
   1、创建表
   2、操作表
      #单表
      
      #连表
         .join
         关系：
            一对多
               fk，关系
            多对多，
               多一张表 fk，fk
               1、 关系表：关系
               
               2、A：关系，（B，AB）
               
            
二、paramiko模块

   SSHClient
      用户名、密码：
         SSHClient,Tranport
   SFTPClient:
      用户名、密码 
         Tranport

   需求：
      命令、上传文件、命令
      import paramiko

#!/usr/bin/env  python
# -*- coding: UTF-8 -*-
# Author: Aaron Shen

# Author:Alex Li
import paramiko
import uuid

class SSHConnection(object):

    def __init__(self, host='192.168.11.90', port=22, username='root',pwd='123'):
        self.host = host
        self.port = port
        self.username = username
        self.pwd = pwd
        self.__k = None

    def run(self):
        self.connect()
        pass
        self.close()

    def connect(self):
        transport = paramiko.Transport((self.host,self.port))
        transport.connect(username=self.username,password=self.pwd)
        self.__transport = transport

    def close(self):
        self.__transport.close()

    def cmd(self, command):
        ssh = paramiko.SSHClient()
        ssh._transport = self.__transport
        # 执行命令
        stdin, stdout, stderr = ssh.exec_command(command)
        # 获取命令结果
        result = stdout.read()
        return result

    def upload(self,local_path, target_path):
        # 连接，上传
        sftp = paramiko.SFTPClient.from_transport(self.__transport)
        # 将location.py 上传至服务器 /tmp/test.py
        sftp.put(local_path, target_path)

    def download(self, remove_path, local_path=r"C:download	est"):
        sftp = paramiko.SFTPClient.from_transport(self.__transport)
        sftp.get(remove_path, local_path)

ssh = SSHConnection()
ssh.connect()

# r1 = ssh.cmd('find / -name "*.mp*"')
# print(r1)

# ssh.upload('t2.py', "/root/t2.py")
ssh.upload("C:迅雷下载【6v电影www.dy131.com】楚门的世界BD中英双字1280高清.rmvb",'/home/lmd/12.mp4')

ssh.close()

   
   Tranport
   
   Tranport关闭
      # 创建SSH对象
      ssh = paramiko.SSHClient()
      # 允许连接不在know_hosts文件中的主机
      ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
      # 连接服务器
      ssh.connect(hostname='c1.salt.com', port=22, username='wupeiqi', password='123')
         
      # 执行命令
      stdin, stdout, stderr = ssh.exec_command('ls')
      # 获取命令结果
      result = stdout.read()
         
      # 关闭连接
      ssh.close()

      import paramiko
        
      transport = paramiko.Transport(('hostname',22))
      transport.connect(username='wupeiqi',password='123')
        
      sftp = paramiko.SFTPClient.from_transport(transport)
      # 将location.py 上传至服务器 /tmp/test.py
      sftp.put('/tmp/location.py', '/tmp/test.py')
      # 将remove_path 下载到本地 local_path
      sftp.get('remove_path', 'local_path')
        
      transport.close()


      ssh = paramiko.SSHClient()
      # 允许连接不在know_hosts文件中的主机
      ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
      # 连接服务器
      ssh.connect(hostname='c1.salt.com', port=22, username='wupeiqi', password='123')
         
      # 执行命令
      stdin, stdout, stderr = ssh.exec_command('ls')
      # 获取命令结果
      result = stdout.read()
         
      # 关闭连接
      ssh.close()
   连接：
      堡垒机