Python文件及目录操作实例详解
本文实例讲述了Python文件及目录操作的方法。分享给大家供大家参考。具体分析如下:
在python中对文件及目录的操作一般涉及多os模块,os.path模块。具体函数以及使用方法在程序中说明。
#!/usr/bin/env python #-*- coding=UTF8 -*- import os import os.path as op def change_dir(): ''' 该函数显示及改变前目录 using chdir() to change current dir getcwd() can show the current working directory ''' directory="/tmp" #使用getcwd()返回当前目录 print os.getcwd() #chdir改变当前目录为:directory目录 os.chdir(directory) print os.getcwd() def show_filesOfdir(whichDir): ''' 此函数只显示目录下的所有文件 using listdir() to shows all of the file execpt directory join() function catenate 'whichDir' with listdir() returns values isfile() check that file is a regular file ''' #listdir() 函数显示前目录的内容 for file in os.listdir(whichDir): #利用join()把whichDir目录及listdir() 返回值连接起来组成合法路径 file_name = op.join(whichDir,file) #isfile()函数可以判断该路径上的文件是否为一个普通文件 if op.isfile(file_name): print file_name def printaccess(path): ''' 显示文件的最后访问时间,修改时间 shows 'path' the last access time getatime() return the time of last access of path stat() return information of a file,use its st_atime return the time of last access ctime() return a string of local time ''' import time #利用ctime()函数返回最后访问时间 #getatime()函数返回最后访问时间,不过是以秒为单位(从新纪元起计算) print time.ctime(op.getatime(path)) #stat()函数返回一个对象包含文件的信息 stat = os.stat(path) #st_atime 最后一次访问的时间 print time.ctime(stat.st_atime) print the modify time print "modify time is:", print time.ctime(op.getctime(path)) print "modify time is:", #st_ctime 最后一次修改的时间 print time.ctime(stat.st_ctime) def isDIR(path): ''' 一个os.path.isdir()函数的实现 Implement isdir() function by myself ''' import stat MODE = os.stat(path).st_mode #返回真假值 return stat.S_ISDIR(MODE) if __name__== "__main__": change_dir() show_filesOfdir('''/root''') printaccess('/etc/passwd') print isDIR('/etc')
希望本文所述对大家的Python程序设计有所帮助。

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