import ftplib
import urllib2
import os
import logging
logger = logging.getLogger('ftpuploader')
hdlr = logging.FileHandler('ftplog.log')
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
hdlr.setFormatter(formatter)
logger.addHandler(hdlr)
logger.setLevel(logging.INFO)
FTPADDR = "some ftp address"

def upload_to_ftp(con, filepath):
    try:
        f = open(filepath,'rb')                # file to send
        con.storbinary('STOR '+ filepath, f)         # Send the file
        f.close()                                # Close file and FTP
        logger.info('File successfully uploaded to '+ FTPADDR)
    except, e:
        logger.error('Failed to upload to ftp: '+ str(e))

这似乎不起作用,我遇到语法错误,将所有类型的异常记录到文件中的正确方法是什么


当前回答

对于未来的奋斗者,在python3.8.2(以及之前的几个版本)中,语法如下

except Attribute as e:
    print(e)

其他回答

在某些情况下,您可以使用e.message或e.messages。但它并非在所有情况下都有效。无论如何,使用str(e)更安全

try:
  ...
except Exception as e:
  print(e.message)

如果要查看原始错误消息,(文件行号)

import traceback
try:
    print(3/0)
except Exception as e:    
    traceback.print_exc() 

这将显示相同的错误消息,就像您没有使用try-except一样。

您必须定义要捕获的异常类型。因此,对于一般异常(无论如何都会记录),写Exception,e:而不是Exception。

另一种可能是用这种方式编写整个try/except代码:

try:
    with open(filepath,'rb') as f:
        con.storbinary('STOR '+ filepath, f)
    logger.info('File successfully uploaded to '+ FTPADDR)
except Exception, e: # work on python 2.x
    logger.error('Failed to upload to ftp: '+ str(e))

在Python 3.x和Python 2.x的现代版本中,使用Exception作为e,而不是Exception,e:

try:
    with open(filepath,'rb') as f:
        con.storbinary('STOR '+ filepath, f)
    logger.info('File successfully uploaded to '+ FTPADDR)
except Exception as e: # work on python 3.x
    logger.error('Failed to upload to ftp: '+ str(e))

还有一种方法可以获得传递给异常类的原始值,而不必更改内容类型。

例如,我在我的一个框架中生成带有错误消息的类型代码。

try:
    # TODO: Your exceptional code here 
    raise Exception((1, "Your code wants the program to exit"))

except Exception as e:
    print("Exception Type:", e.args[0][0], "Message:", e.args[0][1])

输出

Exception Type: 1 Message: 'Your code wants the program to exit'

您可以使用logger.exception(“msg”)记录带有回溯的异常:

try:
    #your code
except Exception as e:
    logger.exception('Failed: ' + str(e))