Introduction method using the Python module and module self examples

Module
module:

The basic embodiment modular organization code pyth1.on

A python script can be run separately, you may be introduced into another script run, when the script is executed when introduced, which we will call the module (Module1)

All points p for the file can be imported as a module

Module with the same file name of the script, for example, we wrote a script called hello.pv you can import hello.py to import it in another script using

package:

python modules can be organized according to the directory for the package

Steps to create a package:

创建一个名字为包名字的目录，在该目录下创建一个__init__.py文件，根据需要在该目录下存放脚本文件或已编译的扩展及子包

grammar:

import pack.m1,pack.m2,pack.m3
sys.path

举例：

In [1]: import sys

In [2]: sys.path

Out[2]:

['',

'/usr/bin',

'/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',

'/usr/lib/python2.7/site-packages/IPython/extensions',

'/root/.ipython']

vim /root/.bashrc

最后加个export PYTHONPATH=/root/library

成功加入到Python环境变量中

In [1]: import sys

In [2]: sys.path

Out[2]:

['',

'/usr/bin',

 '/root/library',

'/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',

'/usr/lib/python2.7/site-packages/IPython/extensions',

'/root/.ipython']

可被其他脚本调用的脚本:

#!/usr/bin/env python

#

def wordCount(s):

    chars = len(s)

    words = len(s.split())

    lines = s.count('\n')

    print lines,words,chars

if __name__=='__main__':  #设置后，本脚本内的函数可被其他脚本调用test.py

    s = open('/etc/passwd').read()

    wordCount(s)

#

[root[@localhost](https://my.oschina.net/u/570656) 20181203]# python words.py

27 52 1324

[root[@localhost](https://my.oschina.net/u/570656) 20181203]# wc /etc/passwd

27   52 1324 /etc/passwd

test.py中导入words.py:

[root[@localhost](https://my.oschina.net/u/570656) 20181203]# cat test.py

#!/usr/bin/env python

import words

#

s="""hello world python"""

words.wordCount(s)

[root[@localhost](https://my.oschina.net/u/570656) 20181203]# python test.py

27 52 1324

[root[@localhost](https://my.oschina.net/u/570656) 20181203]# ls

test.py  words.py  words.pyc   ###调用words后自动生成编译的文件。

Modules and packages:
the module is a script file that can be imported

Some packages are organized by category and sub-modules package, a directory the init .py file that can be stored packets.

Grammar module and import the package:

import,import as

from ... import ...
In [2]: from mode import mode
2 10 158
In [3]: mode.wordCount('abc')
0 1 3

In [4]: import mode.mode
In [5]: mode.mode.wordCount('hello')
0 1 5

In [7]: from mode.mode import wordCount
In [8]: wordCount('aaa')
0 1 3

#重新命名为wc
In [10]: from mode.mode import wordCount as wc
In [11]: wc('aaaddd')
0 1 6

#from package.mod import wordCount
#from package import mod

In [10]: from package import mod

In [11]: mod.wordCount('abc 123')
0 2 7

In [15]: from package.mod import wordCount

In [16]: wordCount('ava adsf34')
0 2 10

Introduction method using the Python module and module self examples

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