发布于 2015-10-02 21:55:30 | 134 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Python教程,程序狗速度看过来!

Python编程语言

Python 是一种面向对象、解释型计算机程序设计语言,由Guido van Rossum于1989年底发明,第一个公开发行版发行于1991年。Python语法简洁而清晰,具有丰富和强大的类库。它常被昵称为胶水语言,它能够把用其他语言制作的各种模块(尤其是C/C++)很轻松地联结在一起。


这篇文章主要介绍了编写Python脚本来实现最简单的FTP下载的教程,主要用到了ftplib模块,无图形界面...需要的朋友可以参考下

访问FTP,无非两件事情:upload和download,最近在项目中需要从ftp下载大量文件,然后我就试着去实验自己的ftp操作类,如下(PS:此段有问题,别复制使用,可以参考去试验自己的ftp类!)

import os
from ftplib import FTP
 
class FTPSync():
  def __init__(self, host, usr, psw, log_file):
    self.host = host
    self.usr = usr
    self.psw = psw
    self.log_file = log_file
   
  def __ConnectServer(self):
    try:
      self.ftp = FTP(self.host)
      self.ftp.login(self.usr, self.psw)
      self.ftp.set_pasv(False)
      return True
    except Exception:
      return False
   
  def __CloseServer(self):
    try:
      self.ftp.quit()
      return True
    except Exception:
      return False
   
  def __CheckSizeEqual(self, remoteFile, localFile):
    try:
      remoteFileSize = self.ftp.size(remoteFile)
      localFileSize = os.path.getsize(localFile)
      if localFileSize == remoteFileSize:
        return True
      else:
        return False
    except Exception:
      return None
     
  def __DownloadFile(self, remoteFile, localFile):
    try:
      self.ftp.cwd(os.path.dirname(remoteFile))
      f = open(localFile, 'wb')
      remoteFileName = 'RETR ' + os.path.basename(remoteFile)
      self.ftp.retrbinary(remoteFileName, f.write)
       
      if self.__CheckSizeEqual(remoteFile, localFile):
        self.log_file.write('The File is downloaded successfully to %s' + 'n' % localFile)
        return True
      else:
        self.log_file.write('The localFile %s size is not same with the remoteFile' + 'n' % localFile)
        return False
    except Exception:
      return False
   
  def __DownloadFolder(self, remoteFolder, localFolder):
    try:
      fileList = []
      self.ftp.retrlines('NLST', fileList.append)
      for remoteFile in fileList:
        localFile = os.path.join(localFolder, remoteFile)
        return self.__DownloadFile(remoteFile, localFile)
    except Exception:
      return False
   
  def SyncFromFTP(self, remoteFolder, localFolder):
    self.__DownloadFolder(remoteFolder, localFolder)
    self.log_file.close()
    self.__CloseServer()



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