Question

我有一个简单的代码（使用Flask-SocketIO和ftplib）从as400机器下载csv文件，但是我得到了一个我不明白的例外...

你知道问题是什么吗？

我的代码：

try:
    localFile = open(localDir + '/' + iso + '/' + output, 'w')
except:
    emit('update-status', (iso, 'Error: Couldn\'t create file ' + localDir + '/' + iso + '/' + output + ' !'))
    return

print('RETR ' + as400Dir + '/' + output)
try:
    ftp.retrlines('RETR ' + as400Dir + '/' + output, localFile.write)
except ftplib.all_errors as e:
# except Exception as e:
    emit('update-status', (iso, 'Error: Couldn\'t download file ' + as400Dir + "/" + output + ' ! -> ' + str(e)))
    return

localFile.close()

控制台输出：

RETR /xreff/pgmref.csv
Exception in thread Thread-5:
Traceback (most recent call last):
  File "D:\LocalData\xxx\Install\Python35-32\lib\threading.py", line 914, in _bootstrap_inner
    self.run()
  File "D:\LocalData\xxx\Install\Python35-32\lib\threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "D:\LocalData\xxx\Install\Python35-32\lib\site-packages\socketio\server.py", line 452, in _handle_event_internal
    r = server._trigger_event(data[0], namespace, sid, *data[1:])
  File "D:\LocalData\xxx\Install\Python35-32\lib\site-packages\socketio\server.py", line 481, in _trigger_event
    return self.handlers[namespace][event](*args)
  File "D:\LocalData\xxx\Install\Python35-32\lib\site-packages\flask_socketio\__init__.py", line 236, in _handler
    *args)
  File "D:\LocalData\xxx\Install\Python35-32\lib\site-packages\flask_socketio\__init__.py", line 618, in _handle_event
    ret = handler(*args)
  File "./index.py", line 453, in updateDatabase
    downloadResourceFiles(iso, user, password, xreff, gafint, sugar)
  File "./index.py", line 545, in downloadResourceFiles
    downloadFiles()
  File "./index.py", line 523, in downloadFiles
    ftp.retrlines('RETR ' + as400Dir + '/' + output, localFile.write)
  File "D:\LocalData\xxx\Install\Python35-32\lib\ftplib.py", line 467, in retrlines
    with self.transfercmd(cmd) as conn, \
AttributeError: __exit__

如果我尝试除了Exception为e 而不是，除了ftplib.all_errors为e ，我得到：

RETR /xreff/pgmref.csv
emitting event "update-status" to b563563a763e48fbba2d394ae8c871e7 [/]
b563563a763e48fbba2d394ae8c871e7: Sending packet MESSAGE data 2["update-status","NL","Error: Couldn't download file /xreff/pgmref.csv ! -> __exit__"]

Python FTP从as400获取文件

0 个答案: