Python从FTP下载文件忽略了丢失的文件(Python download files from FTP ignoring the missing ones)

我有一个csv文件中的数字列表，如下所示：

1 2 3 4 5

还有一个名为类似这些数字的ftp服务器：

1.jpg 2.jpg 4.jpg 5.jpg

（3.jpg缺失）

如果文件名在该csv列表中，我想要下载FTP的所有文件。

在我的代码上，我可以成功下载文件但是当它试图在FTP上下载丢失的文件时程序崩溃：

urllib2.URLError: <urlopen error ftp error: [Errno ftp error] 550 Can't change directory to 3.jpg: No such file or directory>

Python代码：

#!/usr/bin/python # -*- coding: utf-8 -*- import urllib2, shutil import pandas as pd import numpy as np from ftplib import FTP FTP_server = 'ftp://user:pass@server.com/' ftp = FTP_server+'the/path/to/files/' class Test: def Get(self): data = pd.read_csv('test.csv',encoding='utf-8',delimiter=';') #data['REF'].replace('', np.nan, inplace=True) #data.dropna(subset=['REF'], inplace=True) data['REF'] = data['REF'].astype(int) new_data = data['REF'] for ref in new_data: file = str(ref)+str('.jpg') ftpfile = urllib2.urlopen(ftp+file) localfile = open(file, 'wb') shutil.copyfileobj(ftpfile, localfile) Try = Test() Try.Get()

我试图做一个如果在for循环内，但我不能得到它的工作，有人可以给我一些想法或提示plz？

I've a list of numbers on csv file like this:

1 2 3 4 5

And an ftp server with files named like those numbers:

1.jpg 2.jpg 4.jpg 5.jpg

( 3.jpg is missing )

I want to download all the files of the FTP if the filename is on that csv list.

On my code i can successfully download the files but when it tryes to download a missing file on FTP the program crashes with:

urllib2.URLError: <urlopen error ftp error: [Errno ftp error] 550 Can't change directory to 3.jpg: No such file or directory>

Python code:

I'm trying to make an if inside the for loop but i can't get it working, someone can give me some idea or tip plz?

最满意答案

熟悉try-except块来处理这个问题：

for ref in new_data: try: file = str(ref)+str('.jpg') ftpfile = urllib2.urlopen(ftp+file) localfile = open(file, 'wb') shutil.copyfileobj(ftpfile, localfile) except urllib2.URLError: print("-I- Skipping",file," - doesn't exist.")

Get acquainted with try-except blocks to handle this:

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