1、收集系统信息python小程序
1 #!/usr/bin/env python
2 #A system information gathering script
3
4 import subprocess
5 #command 1
6 uname = "uname"
7 uname_arg = "-a"
8 print "Gathering system information with %s command:\n" % uname
9 subprocess.call([uname, uname_arg])
10
11 #command 2
12 diskspace = "df"
13 diskspace_arg = "-h"
14 print "Gathering diskspace information %s command:\n" % diskspace
15 subprocess.call([diskspace, diskspace_arg])
以上实例执行结果为：
# python system_information.py
Gathering system information with uname command:Linux gio016 2.6.32-431.29.2.lustre.el6.x86_64 #1 SMP Fri Jul 31 09:39:58 CST 2015 x86_64 x86_64 x86_64 GNU/Linux
Gathering diskspace information df command:Filesystem Size Used Avail Use% Mounted on
/dev/sda3 258G 71G 174G 29% /
tmpfs 32G 0 32G 0% /dev/shm
/dev/sda1 485M 142M 318M 31% /boot
/dev/memdiska 1.1T 132G 914G 13% /home/export/tmp
2、收集系统信息（定义为多个函数）
1 #!/usr/bin/env python
2 import subprocess
3
4 def uname_func():
5 uname = "uname"
6 uname_arg = "-a"
7 print "Gathering system information with %s command:\n" % uname
8 subprocess.call([uname, uname_arg])
9
10 def disk_func():
11 diskspace = "df"
12 diskspace_arg = "-h"
13 print "Gathering diskspace information %s command:\n" % diskspace
14 subprocess.call([diskspace, diskspace_arg])
15
16 def main():
17 uname_func()
18 disk_func()
19
20 main()
以上实例输出结果为：
# python system_information1.py
Gathering system information with uname command:Linux gio016 2.6.32-431.29.2.lustre.el6.x86_64 #1 SMP Fri Jul 31 09:39:58 CST 2015 x86_64 x86_64 x86_64 GNU/Linux
Gathering diskspace information df command:Filesystem Size Used Avail Use% Mounted on
/dev/sda3 258G 71G 174G 29% /
tmpfs 32G 0 32G 0% /dev/shm
/dev/sda1 485M 142M 318M 31% /boot
/dev/memdiska 1.1T 132G 914G 13% /home/export/tmp
3、使用shell实现该功能
#!/usr/bin/env bash function uname_func()
{
uname="uname -a"
printf "Gathering system information with the $uname command:\n\n"
$uname
} function disk_func()
{
diskspace="df -h"
printf "Gathering diskspace information with the $diskspace command:\n\n"
$diskspace
} function main()
{
uname_func
disk_func
} main
4、fork进程
1 #!/usr/bin/env python
2 import os
3 pid = os.fork()
4 # fork and exec together
5 print("second test")
6 if pid == 0: #This is the child
7 print("this is the child")
8 print("I'm going to exec another program now")
9 os.execl('/bin/ls', 'ls','/etc/passwd')
10 else:
11 print("the child is pid %d" % pid)
12 os.wait()
~
以上实例执行结果为：
# python fork2.py
second test
the child is pid 5341
second test
this is the child
I'm going to exec another program now
/etc/passwd
5、db数据库
1 #!/usr/bin/env python
2 import dbm
3 db = dbm.open('websites', 'w')
4 db['www.wrox.com'] = 'Wrox home page'
5 if db['www.python.org'] != None:
6 print('Found www.python.org')
7 else:
8 print('Error: Missing item')
9
10 for key in db.keys():
11 print("key =",key," value =", db[key])
12
13 del db['www.wrox.com']
14 print("After deleting www.wrox.com, we have:")
15
16 for key in db.keys():
17 print("key =",key," value =",db[key])
18
19 db.close()
以上实例结果：
# python dbmaccess.py
Found www.python.org
('key =', 'www.wrox.com', ' value =', 'Wrox home page')
('key =', 'www.python.org', ' value =', 'Python home page')
After deleting www.wrox.com, we have:
('key =', 'www.python.org', ' value =', 'Python home page')
6、产生随机密码
1 #!/usr/bin/env python
2 from random import choice
3 import string
4 def GenPasswd(length=8, chars=string.letters+string.digits):
5 return ''.join([ choice(chars) for i in range(length)])
6
以上实例执行的结果：
>>> import makepass
>>> for i in range(6):
... print makepass.GenPasswd(12)
...
4sxiLRE6bqAX
QSP2ZXjSsMxl
DLygnUv5T5qq
skL7pb5Zhhvp
GdJnnJKG5mZN
6gmow2qv47Tg
7、查看当前目录是否有(.py) python程序
>>> import os
>>> [x for x in os.listdir('.') if os.path.isfile(x) and os.path.splitext(x)[1]=='.py']
