python学习之路三（文件读写）

# -*- coding: utf-8 -* '''Created on 2013-7-29@author: lixingle'''import os  #引入操作文件和目录的函数包import pickle#数据持久化..................................................#写入文件fout=open('g://test.txt','w')#如果要写入第二个参数 要写‘w’fout.write('你好吗？')fout.write('好') #接着写#格式输入,多个占位符时后面要跟一个元组line='my name is %s age is %d'%('lixingle',22)print linefout.write('\n'+line) #接着写#文件内如下：#你好吗？好#my name is lixingle age is 22fout.close()#关闭文件cwd=os.getcwd()print cwd #D:\JAVATiku\SiYue\Python\PythonDemo\src\demosprint os.path.abspath('test.txt')#返回绝对路径print os.path.isdir('test.txt')#False 判断是否为目录#捕获异常......................................................try:    fop=open('g://test')    for line in fop:        print line    fop.close()   except:    print 'Something went wrong'#读取文件try:    fop=open('g://test.txt')    line=fop.readline()#读取一行    print line    fop.close()   except:    print 'Something went wrong'