用python实现一个能用就行的单词查询程序

          学习的过程中会遇到很多单词，有时候我就像把这些单词记录下来，下次可以方便查询，加上我的英语就那样，我需要有一种查询可以“模糊匹配“，比如我输入“et“，会出来包含“et“的所有单词。于是我写了一个“能用就行“的单词查询程序，用一段时间就改进一些，也尝试了GUI设计，个人觉得GUI查询单词效率很低，于是回归CLI（命令行接口）程序。
代码如下，算是备份：

#!/usr/bin/env python

"""
   The Program Name:    mydict.py

   This program will save the word pair as a dictionary.It can query,list,update,
   add,delete word,and view version or exit.

   Copyright (C) 1989,1999 Free Software Foundation,Inc.

   Copyleft (C) 2011 ClownFish([e-mail])

"""
#Program:     mydict.py
#Author:      clownfish
#Date:        2011/04/02
#Rev:         4.1Beta
#Plotform:    Ubuntu



import re
import os.path,os


def help():
    "get help information"
    print "\n========Help Mode===== '#' to quit this mode=="
    print '\n\n'
    print '''\n\n    Hi,Welcome to MyDictionary.You may be want to have a dictionary just for yourself in you life.So I share it with you free.But if you want to update it,you should to tell user the mydictionary is based on my name,please!'''
    print '\n\n'
    if (raw_input("    next step by enter anything >>> ").strip().lower()) == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (1).the function listWord(),you have to input the word's fist byte in [a-z],and if you dont do that,the function will not work.And you should input something about the word,if you input nothing ,the dictionary will list all the words begin with you have just inputed first word.\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (2).the functiom addWord(),you can add the word .I want to make it work faster,so you should input the first byte right.\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (3).the function updateWord(),if you have found a error word or you want to update a word,the this function will give you surprise.\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (4).the function deleteWord(),you may input a error word and you want to delete it.Just do it!\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (5).the function queryWord() ,you have to input a right word,then you will get it's meaning.If you want to get some surprise,you should add a new word with interesting ^_^\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (6).the function saveDT(),I need to make it work faster,but if you dont use the function,the new word which you have just added will not save in you harddisk,so if you want to use it safety,you should use it,good luck.\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (7).the function exit(),means you have got you work,have a good time.\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (8).the function version(),get some inforamtion about me,zhubuntu...\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (9).the test function main()\n\n'''
    if raw_input("    next step by enter anything >>> ").strip().lower() == '#':
        print 'You have quited this mode!'
        return
    print '''\n\n    (10).GOOD LUCK,GOOD BYE!\n\n'''


def listWord():
    "list the word depend the regex you input,it will work well when you just know less info about the word"

    print "\n======List Mode===== '#' to quit this mode=="

    firstwd=raw_input("Enter the first byte [a-z] >>> ").strip().lower()

    if firstwd == '':firstwd='\w'

    if firstwd == '#':
        print 'You have quited this mode!'
        preturn

    if firstwd not in "abcdefghijklmnopqrstuvwxyz'\w'":
        print "Input the right char as the word's beginning...."
        return

    regex = raw_input("Enter the keywords >>>").strip().lower()
    if regex == '':regex='\w+'
    if regex == '#':
        print 'You have quited this mode!'
        return

    moreV = 0;
    for firstkey in DT.keys():
        if re.match(firstwd,firstkey):
            for secondkey in DT[firstkey]:
                if re.search(regex,secondkey) or re.search(regex,DT[firstkey][secondkey]):
                         print ' ' * 10,secondkey,'   ====>   ',DT[firstkey][secondkey],'\n'
                        moreV += 1
                        if moreV >= 10:
                            moreA=raw_input("---More---")
                            moreV=0
                            if moreA == '#':
                                return


def addWord():
    "add a new word"

    print "\n========Add Mode===== '#' to quit this mode=="

    key = raw_input("Enter the word >>> ").strip().lower()

    while key == '':
        key = raw_input("Enter the word >>> ").strip().lower()
    if key == '#':
        print 'You have quited this mode!'
        return
    if key[0] not in "abcdefghijklmnopqrstuvwxyz":
        print "Input a word beginning with [a-z]...."
        return


    word = raw_input('Enter the word\'s meaning >>> ').strip()
    while word == '':
        word=raw_input('Enter the word\'s meaning >>>').strip()
    if word == '#':
        print "You have quited this mode!"
        return


    dt={}
    dt[key] = word
    newkey = key[0]
    DT[newkey].update(dt)
    addWord()


def queryWord():
    "query a word's meaning"

    print "\n=========Query Mode==== '#' to quit this mode"

    key = raw_input('Enter the word >>> ').strip().lower()
    while key == '':
        key=raw_input("Enter the word >>> ").strip().lower()
    if key == '#':
        print "You have quited this mode!"
        return

    if not DT.has_key(key[0]):
        return

    if key in DT[key[0]]:
        print ' '*10,key,'    ==>    ',DT[key[0]][key]
    else:
        print ' '*10,' Cannot Find !'

def updateWord():
    "update a old word or add as a new word"

    print "\n============Update Mode======= '#' quit this mode=="

    key = raw_input("Enter the word >>> ").strip().lower()
    while key == '':
        key=raw_input("Enter the word >>> ").strip().lower()
    if key == '#':
        print 'You have quited the update mode.'
        return

    if not DT.has_key(key[0]):
        return
    if key in DT[key[0]]:
        print DT[key[0]][key]

        yesno=raw_input("Do you want to update it?[yes][no]")
        if yesno == 'yes':
            word=raw_input("Enter the word\'s new meaning >> ").strip()
            while word == '':
                word=raw_input("Enter the word\'s new meaning >>> ").strip()
            if word == '#':
                print 'You have quited this mode!'
                return

            DT[key[0]][key]=word
            print key,'    ===New Meaning====>    ',word

        elif yesno == '#':
            print 'You have quited this mode!'
            return
        else:
            pass


    else:
        print '     Can not find the word!'


def saveDT():
    "save the new word into hardisk"

    f = open(default_file,'w')
    f.write(str(DT))
    f.close()
    print 'You have save this dictionary'

def setting():
    if not os.path.exists(default_file):
        if os.path.exists(default_file+".backup"):
            os.system("cp "+default_file+".backup"+" "+default_file)
            return

        os.system("touch "+default_file)
        temp = {}
        for item in 'abcdefghigklmnopqrstuvwxyz':
            temp[item] = {}

        ff = open(default_file,'w')
        ff.write(str(temp))
        ff.close()
        print 'You have made a setting file :\n'+default_file+'\n'

    else:
        if not os.path.exists(default_file+".backup"):
            temp = {}
            for item in 'abcdefghigklmnopqrstuvwxyz':
                temp[item] = {}

            ff = open(default_file,'w')
            ff.write(str(temp))
            ff.close()
            return

        ff = open(default_file,'r')
        if ff.read() == '':
            ff.close()
            os.system("cp "+default_file+".backup "+default_file)

def deleteWord():
    "delete a old word"

    print "\n=======Delete Mode=======  '#' to quit\n\n"

    key = raw_input("Enter the word >>> ").strip().lower()
    while key == '':
        key=raw_input("Enter the word >>> ")
    if key == '#':
        print 'You have quited the delete mode'
        return

    if not DT.has_key(key[0]):
        print "Can not find it!"
        return

    if key in DT[key[0]]:
        print key,' ===> ',DT[key[0]][key]
        yesno = raw_input("Do you want to delete it?[yes][no]").strip().lower()
        if yesno == 'yes':
            print DT[key[0]][key],'    ===== Have Deleted===='
            DT[key[0]].pop(key)
        elif yesno == '#':
            print 'You have quited this mode!'
            return
        else:
            pass


    else:
        print '     Can not find the word'

def exit():
    "exit the dictionary"

    saveDT()
    print ',\n','*' * 80,'\n'
    print ' ' * 20,'GoodBye,Good Luck!',' ' * 10,'\n'
    print '*' * 80,'\n\n'


def version():
    "version information"

    print '*' * 80
    print '''
        MyDictionary Version 4.2
        Command Line Function Programming
        By ClownFish
        @ 2011-05-05
        Email:[e-mail]
        '''
    print '*' * 80

def main():
    "main function for testing"

    setting()
    os.system("cp "+default_file+" "+default_file+".backup") # backup dict

    f = open(default_file,'r')
    try:
        DT.update(eval(f.read().strip()))    # convert string to dict
    except:
        pass

    f.close()

    version()

    while True:
        Entry = raw_input('''
                (A)dd
                (Q)uary
                (U)pdate
                (L)ist
                (S)ave
                (D)elte
                (H)elp
                (E)xit
                (V)ersion
                ''').strip().lower()
        if Entry in 'aqueldsvh' and Entry != '':
            if Entry == 'a':
                addWord()
                saveDT()
            elif Entry == 'q':
                queryWord()
            elif Entry == 'u':
                updateWord()
                saveDT()
            elif Entry == 'l':
                listWord()
            elif Entry == 'd':
                deleteWord()
                saveDT()
            elif Entry == 's':
                saveDT()
            elif Entry == 'v':
                version()
            elif Entry == 'h':
                help()
            else:
                exit()
                break
        else:
            pass

if __name__ == '__main__':
    default_file = os.path.expanduser('~/.newDT.txt')  # convert '~' to homedir
    DT = {}
    main()