这里使用python3版本
使用pyenv进行python多版本管理
这里使用使用的系统CentOS release 6.5 (Final)
1.安装pyenv
[root@localhost ~]# curl -L https://raw.githubusercontent.com/yyuu/pyenv-installer/master/bin/pyenv-installer | bash
编辑~/.bash_profile
# the following to ~/.bash_profile:
export PATH="/root/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
2.安装python3.4.2
[root@localhost ~]# pyenv install 3.4.2
[root@localhost ~]# pyenv local 3.4.2
3.pyenv使用
pyenv versions
查看当前 pyenv 可检测到的所有版本，处于激活状态的版本前以 * 标示。
$ pyenv versions
system
3.4.2
3.4.2/envs/eddy_001
3.5.0
* eddy_001 (set by /root/magedu/.python-version)
pyenv version
查看当前处于激活状态的版本，括号中内容表示这个版本是由哪条途径激活的（global、local）
$ pyenv version
eddy_001 (set by /root/magedu/.python-version
pyenv uninstall
卸载一个版本
$ pyenv uninstall eddy_001
为所有已安装的可执行文件 （如：~/.pyenv/versions/*/bin/*） 创建 shims，因此，每当你增删了 Python 版本或带有可执行文件的包（如 pip）以后，都应该执行一次本命令
$ pyenv install 3.4.2
$ pyenv rehash
pyenv global
设置全局的 Python 版本，通过将版本号写入 ~/.pyenv/version 文件的方式。
$ pyenv global 3.4.0
pyenv local
设置面向程序的本地版本，通过将版本号写入当前目录下的 .python-version 文件的方式。通过这种方式设置的 Python 版本优先级较 global 高。
pyenv会从当前目录开始向上逐级查找 .python-version 文件，直到根目录为止。若找不到，就用 global 版本。
$ pyenv local 3.4.2
4.jupyter
ipython web页面版，具体使用可自己摸索
pip install ipython
pip install jupyter
jupyter notebook --ip=0.0.0.0
5.建立自己的隔离环境
pyenv virtualenv 3.4.2 eddy_001
pyenv local eddy_001
5.pymysql模块
连接数据库：conn = pymysql.connect(host='192.168.6.229',port=3306,user='mon',passwd='123456',db='pymysql_test',charset='utf8')
获取操作游标：curs=conn.cursor()
执行sql语句,插入记录：sta=curs.execute("insert 语句") 执行成功后sta值为1。更新、删除语句与此类似
执行sql语句，查询记录：cur.execute("select语句") 执行成功后cur变量中保存了查询结果记录集，然后再用循环打印结果：
for row in curs:
for col in row:
print(col.decode('utf-8'), end = ' ')#如果是中文则需要处理编码
print()
关闭数据库连接： curs.close(); conn.close();
#!/root/.pyenv/shims/python
#-*- coding: utf-8 -*-
#@author: eddy
#@contact: [email protected]
#@site: http://my.oschina.net/eddylinux
import pymysql
#连接数据库函数
def connDB():
conn = pymysql.connect(host='X.X.X.X',port=3306,user='XXX',passwd='XXXXXX',db='XXXXX',charset='utf8')
curs = conn.cursor()
return(conn, curs)
#更新语句，可执行update,insert语句
#sta=cur.execute("insert 语句") 执行成功后sta值为1。更新、删除语句与此类似
def exeUdate(curs,sql):
sta = curs.execute(sql)
return(sta)
#删除语句，可批量删除
def exeDelete(curs,IDs):
for eachID in IDs.split(','):
sta=curs.execute('delete from eddy where id =%d' %int(eachID))
return(sta)
#查询语句
def exeQuery(cur,sql):
curs.execute(sql)
return (cur)
#关闭所有连接
def connClose(conn,curs):
curs.close()
conn.close()
#调用连接数据库的函数
conn,curs = connDB()
#调用更新记录的函数
sta = exeUdate(curs,'insert into eddy values(1,"eddy1")')
if sta == 1:
print('insert successed')
else:
print('insert failed')
#查询现有数据，并打印
exeQuery(curs, 'SELECT * FROM eddy')
for row in curs:
for col in row:
print(col, end = ' ')
print()
#批量删除记录，用户输入要删除的记录id号
ID=input('请输入要删除的编号,编号之间用逗号分开:');
sta=exeDelete(curs, ID);
if(sta==1):
print('删除成功');
else:
print('删除失败');
#关闭数据库
connClose(conn, curs)
paramiko安装
pip install paramiko
#!/root/.pyenv/shims/python
#-*- coding: utf-8 -*-
#@author: eddy
#@contact: [email protected]
#@site: http://my.oschina.net/eddylinux
import paramiko
#设置基本变量主机，端口，用户名，密码，命令
HOST = "192.168.6.229"
PORT = 22
USER = "root"
PASSWD = "123456"
CMD = "ifconfig"
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
#传递基本变量到连接信息中
ssh.connect(HOST,PORT,USER,PASSWD)
#执行命令，并把结果付给变量
stdin,stdout,stderr = ssh.exec_command(CMD)
result = stdout
print("*" * 20 ,"结果","*" * 20)
for i in result:
print(i, end = ' ')
#上传、下载
t = paramiko.Transport((HOST,PORT))
t.connect(username=USER,password=PASSWD)
sftp = paramiko.SFTPClient.from_transport(t)
sftp.put('/tmp/test.py','/tmp/test.py')
sftp.get('/tmp/check_web.py','/tmp/check_web.py')
t.close()
CMD = 'ls /tmp/test.py'
stdin,stdout,stderr = ssh.exec_command(CMD)
result = stdout
print("*" * 20 ,"结果","*" * 20)
for i in result:
print(i, end = ' ')
ssh.close()
执行结果
******************** 结果 ********************
eth0 Link encap:Ethernet HWaddr 00:0C:29:83:AF:C8
inet addr:192.168.6.229 Bcast:192.168.6.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe83:afc8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:96089284 errors:0 dropped:0 overruns:0 frame:0
TX packets:52108810 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13832749831 (12.8 GiB) TX bytes:4450847967 (4.1 GiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:48058661 errors:0 dropped:0 overruns:0 frame:0
TX packets:48058661 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10916592053 (10.1 GiB) TX bytes:10916592053 (10.1 GiB)
******************** 结果 ********************
/tmp/test.py
附：pymysql简要说明
Contents
Requirements
Installation
Test Suite
Example
Resources
License
This package contains a pure-Python MySQL client library. The goal of PyMySQL is to be a drop-in replacement for MySQLdb and work on CPython, PyPy and IronPython.
Requirements
Python -- one of the following:
CPython >= 2.6 or >= 3.3
PyPy >= 4.0
IronPython 2.7
MySQL Server -- one of the following:
MySQL >= 4.1 (tested with only 5.5~)
MariaDB >= 5.1
Installation
The last stable release is available on PyPI and can be installed with pip:
$ pip install PyMySQL
Alternatively (e.g. if pip is not available), a tarball can be downloaded from GitHub and installed with Setuptools:
$ # X.X is the desired PyMySQL version (e.g. 0.5 or 0.6).
$ curl -L https://github.com/PyMySQL/PyMySQL/tarball/pymysql-X.X | tar xz
$ cd PyMySQL*
$ python setup.py install
$ # The folder PyMySQL* can be safely removed now.
Test Suite
If you would like to run the test suite, create database for test like this:
mysql -e 'create database test_pymysql DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'
mysql -e 'create database test_pymysql2 DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'
Then, copy the file .travis.databases.json to pymysql/tests/databases.json and edit the new file to match your MySQL configuration:
$ cp .travis.databases.json pymysql/tests/databases.json
$ $EDITOR pymysql/tests/databases.json
To run all the tests, execute the script runtests.py:
$ python runtests.py
A tox.ini file is also provided for conveniently running tests on multiple Python versions:
$ tox
Example
CREATE TABLE `users` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`email` varchar(255) COLLATE utf8_bin NOT NULL,
`password` varchar(255) COLLATE utf8_bin NOT NULL,
PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_binAUTO_INCREMENT=1 ;
import pymysql.cursors# Connect to the databaseconnection = pymysql.connect(host='localhost',
user='user',
password='passwd',
db='db',
charset='utf8mb4',
cursorclass=pymysql.cursors.DictCursor)try:
with connection.cursor() as cursor:
# Create a new record
sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"
cursor.execute(sql, ('[email protected]', 'very-secret'))
# connection is not autocommit by default. So you must commit to save
# your changes.
connection.commit()
with connection.cursor() as cursor:
# Read a single record
sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"
cursor.execute(sql, ('[email protected]',))
result = cursor.fetchone()
print(result)finally:
connection.close()
This example will print:
{'password': 'very-secret', 'id': 1}
Resources
DownLoad：https://pypi.python.org/pypi/PyMySQL
DB-API 2.0: http://www.python.org/dev/peps/pep-0249
MySQL Reference Manuals: http://dev.mysql.com/doc/
MySQL client/server protocol: http://dev.mysql.com/doc/internals/en/client-server-protocol.html
PyMySQL mailing list: https://groups.google.com/forum/#!forum/pymysql-users
paramiko：
API docs:http://docs.paramiko.org
