python小白-day9 数据库操作与Paramiko模块

paramiko模块

SSHClient

用于连接远程服务器并执行基本命令

基于用户名密码连接：

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import paramiko
 
# 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='192.168.11.200', port=22, username='hetan', password='123456')
 
# 执行命令
stdin, stdout, stderr = ssh.exec_command('df')
# 获取命令结果
result = stdout.read()
print(result.decode())
# 关闭连接
ssh.close()


SSHClient 封装 Transport：

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import paramiko
 
transport = paramiko.Transport(('192.168.11.200', 22))
transport.connect(username='hetan', password='123456')
 
ssh = paramiko.SSHClient()
ssh._transport = transport
 
stdin, stdout, stderr = ssh.exec_command('df')
print(stdout.read().decode())
 
transport.close()

基于公钥密钥连接：

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import paramiko
  
private_key = paramiko.RSAKey.from_private_key_file('/home/auto/.ssh/id_rsa')
  
# 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='192.168.11.200', port=22, username='hetan', key=private_key)
  
# 执行命令
stdin, stdout, stderr = ssh.exec_command('df')
# 获取命令结果
result = stdout.read()
print(result.decode())
# 关闭连接
ssh.close()

SSHClient 封装 Transport：

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import paramiko
 
private_key = paramiko.RSAKey.from_private_key_file('/home/auto/.ssh/id_rsa')
 
transport = paramiko.Transport(('192.168.11.200', 22))
transport.connect(username='hetan', pkey=private_key)
 
ssh = paramiko.SSHClient()
ssh._transport = transport
 
stdin, stdout, stderr = ssh.exec_command('df')
 
transport.close()

SFTPClient

用于连接远程服务器并执行上传下载

基于用户名密码上传下载

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import paramiko
  
transport = paramiko.Transport(('192.168.11.200',22))
transport.connect(username='hetan',password='123456')
  
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()

基于公钥密钥上传下载

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import paramiko
 
private_key = paramiko.RSAKey.from_private_key_file('/home/auto/.ssh/id_rsa')
 
transport = paramiko.Transport(('192.168.11.200', 22))
transport.connect(username='hetan', pkey=private_key )
 
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()

上传文件并改名：

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#!/usr/bin/env python
import paramiko
import uuid
 
class Haproxy(object):
 
    def __init__(self):
        self.host = '192.168.11.200'
        self.port = 22
        self.username = 'hetan'
        self.pwd = '123456'
        self.__k = None
 
    def create_file(self):
        file_name = str(uuid.uuid4())
        with open(file_name,'w') as f:
            f.write('sb')
        return file_name
 
    def run(self):
        self.connect()
        self.upload()
        self.rename()
        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 upload(self):
        # 连接，上传
        file_name = self.create_file()
 
        sftp = paramiko.SFTPClient.from_transport(self.__transport)
        # 将location.py 上传至服务器 /tmp/test.py
        sftp.put(file_name, '/home/hetan/tttttttttttt.py')
 
    def rename(self):
 
        ssh = paramiko.SSHClient()
        ssh._transport = self.__transport
        # 执行命令
        stdin, stdout, stderr = ssh.exec_command('mv /home/hetan/tttttttttttt.py /home/hetan/ooooooooo.py')
        # 获取命令结果
        result = stdout.read()
 
 
ha = Haproxy()
ha.run()


数据库操作

Python MySQL API

一、插入数据

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import pymysql
   
conn = pymysql.connect(host='192.168.11.200',user='hetan',passwd='123456',db='mydb')
   
cur = conn.cursor()
   
reCount = cur.execute('insert into students(name,sex,age,tel) values(%s,%s,%s,%s)',('liuyao','man','20','1235'))
   
conn.commit()
   
cur.close()
conn.close()
   
print(reCount)


二、批量插入数据

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import pymysql
   
conn = pymysql.connect(host='192.168.11.200',user='hetan',passwd='123456',db='mydb')
   
cur = conn.cursor()
li = [
    ('alex','man',18,'1515151'),
    ('wupeiqi','man',18,'1551515')
]
   
reCount = cur.executemany('insert into students(name,sex,age,tel) values(%s,%s,%s,%s)',li)
   
conn.commit()
   
cur.close()
conn.close()
   
print(reCount)


三、删除数据

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import pymysql
   
conn = pymysql.connect(host='192.168.11.200',user='hetan',passwd='123456',db='mydb')
   
cur = conn.cursor()
 
reCount = cur.execute('delete from students where id=%s',('1',))
   
conn.commit()
   
cur.close()
conn.close()
   
print(reCount)


四、修改数据

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import pymysql
   
conn = pymysql.connect(host='192.168.11.200',user='hetan',passwd='123456',db='mydb')
   
cur = conn.cursor()
 
reCount = cur.execute('update students SET name=%s WHERE id=%s',('hetan','2',))
   
conn.commit()
   
cur.close()
conn.close()
   
print(reCount)


五、查数据​

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import pymysql
   
conn = pymysql.connect(host='192.168.11.200',user='hetan',passwd='123456',db='mydb')
   
cur = conn.cursor()
 
reCount = cur.execute('select * from students')
   
print(cur.fetchone())
print(cur.fetchone())
cur.scroll(-1,mode='relative')
print(cur.fetchone())
print(cur.fetchone())
cur.scroll(0,mode='absolute')
print(cur.fetchone())
print(cur.fetchone())
cur.close()
conn.close()
   
print(reCount)


查询全部：

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import pymysql
   
conn = pymysql.connect(host='192.168.11.200',user='hetan',passwd='123456',db='mydb')
   
cur = conn.cursor()
 
reCount = cur.execute('select * from students')
   
print(cur.fetchall())
cur.close()
conn.close()
   
print(reCount)

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来自为知笔记(Wiz)


posted on 2016-03-13 23:30  显卡  阅读(190)  评论(0)  编辑  收藏  举报

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