task week 1

*完成一个极简交互式日记系统,需求如下:

*一次接收输入一行日记

*保存为本地文件

*再次运行系统时,能打印出过往的所有日记

windows 8 ,python 2.7.10, sublimetext2

*test： import diary

diary.init()
    txt :this is week1 task of diary

diary.write()
    diary:test1
    diary:test2
    diary:test3
    diary:中文
    diary:中文
    diary:
    >>> 

    txt:this is week1 task of diary
    test1
    test2
    test3
    中文
    中文

diary.read()
    txt:this is week1 task of diary
    test1
    test2
    test3
    中文
    中文

参考资料：1.笨办法学python，习题16

       2. 简明python教程，12.输入/输出

code

# -*- coding:utf-8 -*-

def init(): import sys

diary = 'this is week1 task of diary\n '

f = file('diary.txt','w') # open for 'w'riting
f.write(diary) # write text to file
f.close() # close the file

def write(): diaryfile = 'diary.txt'

while True:
    d = raw_input('diary:')
    if d == '':
        break
    else :
        f = open(diaryfile,'a')
        f.write(d)
        f.write('\n')
f.close()

def read(): f = file('diary.txt')

while True:
    line = f.readline()
    if len(line) == 0:
        break
    print line,
f.close()