用python的cmd模块写一个简单的shell
from cmd import *
class MyShell(Cmd):
def preloop(self):
print "print this line before entering the loop"
def postloop(self):
print "print this line after leaving the loop"
def precmd(self, line):
print "print this line before do a command"
return Cmd.precmd(self, line)
def postcmd(self, stop, line):
print "print this line after do a command"
return Cmd.postcmd(self, stop, line)
def do_test(self, line):
''' test command, just print the arguments except some special ones'''
if line == "exit":
exit()
else:
print line
MyShell().cmdloop()
#继承cmd模块的Cmd类实现
#shell中的命令xx在类中对应的函数名为do_xx
#line是shell中输入的命令行参数
相关文档：
这个代码是基于python3.0写的，有许多不完善的地方，请自已修改。
# coding: utf-8
from tkinter import *
root = Tk()
root.title("python3.0查询")
#root.minsize(800,600)
#填充无用空间
Label(root).grid(ipady=5)
#11面板
class Frame11:
def __init__(self, root): # ......
前一篇讲了简单的C/C++调用Python脚本模块（.py）。既然是用于诸多游戏程序的脚本语言，那肯定是缺不了互调（礼尚往来）。因此，本篇讲一个简单的python调用C/C++写的DLL模块，对Python进行功能扩展。这里写一个简单的例子，主要就为了了解下这么用Python来调用C/C++写的DLL库。好了，切入正题：
首先，我是用VS2003 ......
#!/usr/bin/env python
# -*-coding:UTF-8-*-#这一句告诉python用UTF-8编码
#=========================================================================
#
# NAME: Python MySQL test
#
# AUTHOR: benyur
# DATE : 2004-12-28
#
# COMMENT: 这是一个python连接mysql的例子
#
#================ ......
import this
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough t ......
Python中文件操作可以通过open函数，这的确很像C语言中的fopen。通过open函数获取一个file object，然后调用read()，write()等方法对文件进行读写操作。
1.open
使用open打开文件后一定要记得调用文件对象的close()方法。比如可以用try/finally语句来确保最后能关闭文件。
file_object = open('thefile.txt' ......
