python异常消息捕获

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

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))

2011-01-14 11:40:46

其他回答

可以尝试显式指定BaseException类型。然而，这只会捕获BaseException的派生。虽然这包括所有实现提供的异常，但也可能引发任意的旧式类。

try:
  do_something()
except BaseException, e:
  logger.error('Failed to do something: ' + str(e))

2011-01-14 11:40:04

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))

2011-01-14 11:40:46

在python 3.6之后，您可以使用格式化的字符串文字。很整洁！(https://docs.python.org/3/whatsnew/3.6.html#whatsnew36-pep498）

try
 ...
except Exception as e:
    logger.error(f"Failed to upload to ftp: {e}")

2018-09-06 14:16:47

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)

2017-04-17 14:43:44

将其更新为更简单的日志记录器（适用于python2和3）。您不需要回溯模块。

import logging

logger = logging.Logger('catch_all')

def catchEverythingInLog():
    try:
        ... do something ...
    except Exception as e:
        logger.error(e, exc_info=True)
        ... exception handling ...

这是现在的旧方法（尽管仍然有效）：

import sys, traceback

def catchEverything():
    try:
        ... some operation(s) ...
    except:
        exc_type, exc_value, exc_traceback = sys.exc_info()
        ... exception handling ...

exc_value是错误消息。

2013-09-30 18:58:37

python异常消息捕获

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