python 模块的导入和使用

 

 

[root@web-02 dist-packages]# cat indentation.py

 

#!/usr/bin/enb python
version = 'v1.0'
author = 'Madon'
def sayHi (n):
  print 'hi , this is a module.',n

 

//这里说明一下，我写的这个模块。2-3行使用的变量，用户调用version和author输出对应内容。

//第四行使用sayHi 加用户输入内容。则输出print里面的内容。

 

[root@web-02 dist-packages]# pwd

/usr/lib/python2.7/dist-packages

[root@web-02 dist-packages]# 

 

 

>>> import tab

>>> import indentation

>>> indentation.

indentation.__class__(         indentation.__package__

indentation.__delattr__(       indentation.__reduce__(

indentation.__dict__           indentation.__reduce_ex__(

indentation.__doc__            indentation.__repr__(

indentation.__file__           indentation.__setattr__(

indentation.__format__(        indentation.__sizeof__(

indentation.__getattribute__(  indentation.__str__(

indentation.__hash__(          indentation.__subclasshook__(

indentation.__init__(          indentation.author

indentation.__name__           indentation.sayHi(

indentation.__new__(           indentation.version

>>> indentation.version

'v1.0'

>>> indentation.author

'Madon'

>>> indentation.sayHi('Madon')

hi , this is a module. Madon

>>> exit()

[root@web-02 di

 

os模块以及直接使用system

>>> import tab

>>> import os

>>> os.system('du ')

16      .

0

>>> os.system('df ') 

Filesystem     1K-blocks    Used Available Use% Mounted on

/dev/sda3       40771124 1879660  38891464   5% /

devtmpfs          240200       0    240200   0% /dev

tmpfs             248952       0    248952   0% /dev/shm

tmpfs             248952   24964    223988  11% /run

tmpfs             248952       0    248952   0% /sys/fs/cgroup

/dev/sda1          98988   95756      3232  97% /boot

0

>>> from os import system

>>> system('df')

Filesystem     1K-blocks    Used Available Use% Mounted on

/dev/sda3       40771124 1879660  38891464   5% /

devtmpfs          240200       0    240200   0% /dev

tmpfs             248952       0    248952   0% /dev/shm

tmpfs             248952   24964    223988  11% /run

tmpfs             248952       0    248952   0% /sys/fs/cgroup

/dev/sda1          98988   95756      3232  97% /boot

0

>>> 

>>> from os import system as s

>>> s('df ')

Filesystem     1K-blocks    Used Available Use% Mounted on

/dev/sda3       40771124 1879660  38891464   5% /

devtmpfs          240200       0    240200   0% /dev

tmpfs             248952       0    248952   0% /dev/shm

tmpfs             248952   24964    223988  11% /run

tmpfs             248952       0    248952   0% /sys/fs/cgroup

/dev/sda1          98988   95756      3232  97% /boot

0

>>> 

 

如果模块在这些路径下 没有找到的话，就会报错。

>>> import sys

>>> sys.path

['', '/usr/lib64/python27.zip', '/usr/lib64/python2.7', '/usr/lib64/python2.7/plat-linux2', '/usr/lib64/python2.7/lib-tk', '/usr/lib64/python2.7/lib-old', '/usr/lib64/python2.7/lib-dynload', '/usr/lib64/python2.7/site-packages', '/usr/lib64/python2.7/site-packages/gtk-2.0', '/usr/lib/python2.7/site-packages']

>>>