Detailed Python custom modules

Python can add a custom module

Method One:

echo ' Export pythonpath= '/root/pythondiy/' >>/ROOT/.BASHRC # This directory is the path to your module # then use the SYS module to view the environment variables import Syssys.path          # return a list of [' ', '/usr/local/bin ',/root/pythondiy ', '/usr/local/lib/python27.zip ', '/usr/local/lib/python2.7 ', '/usr/ Local/lib/python2.7/plat-linux2 ', '/usr/local/lib/python2.7/lib-tk ', '/usr/local/lib/python2.7/lib-old ', '/usr/ Local/lib/python2.7/lib-dynload ', '/usr/local/lib/python2.7/site-packages ', '/usr/local/lib/python2.7/ Site-packages/setuptools-28.8.0-py2.7.egg ', '/usr/local/lib/python2.7/site-packages/pip-9.0.1-py2.7.egg ', '/usr/ Local/lib/python2.7/site-packages/ipython/extensions ', '/root/.ipython ']

Method Two:

Sys.path.append ('/root/pythondiy ') # This method is temporarily valid

2. Open opening file differences

Open ('/etc/passwd '). Read ()                        # Returns the full text of the Stropen ('/etc/passwd '). ReadLines ()                   # Returns the full text is a listopen ('/etc/passwd '). ReadLine ()                    # reads a row each time and returns STR

3. Custom module Calls

Vim Wc.py#!/usr/bin/python from sys import argv def WC (s):    chars = Len (s)    words = Len (S.split ())    lines = S.cou NT (' \ n ')    return  lines,words,chars if __name__== ' __main__ ':                      # The function is called only when the script is executed. With    Open (Argv[1]) as file1:        print WC (File1.read ())         vim Copy_wc.pyimport

4. Implementation results

[Root@peng pyth]# python wc.py  /etc/passwd    # returns passwd file statistics (+, 1066) [Root@peng pyth]# python copy_wc.py< c14/># returns the Hosts file statistics (2, 10, 158)

5. Import the module package

# need to create a __init__.py empty file in the package, or it can be a description of the package Touch __init__.pyipythonfrom pyth Import WC # This will import a module package