Question

我的python程序通过ssh获取邮件日志数据。当我尝试用

换行时每行

with text as f:
    for line in f:
        try:
             .... regex stuff....

我收到错误：

Traceback (most recent call last):
  File "xxxxxxxxxxxxxxxxxxxxxxxx", line 90, in <module>
    start()
  File "xxxxxxxxxxxxxxxxxxxxxxxx", line 64, in start
    with text as f:
AttributeError: __exit__

这不起作用，对我有用的唯一解决方案如下。当我将文本保存为文件并再次打开时。但该文件大约1.24 MB，这不必要地减慢程序。有谁知道如何摆脱额外的储蓄？

....
stdin, stdout, stderr = ssh.exec_command('sudo cat /var/log/mailing.log')
text = ''.join(stdout.readlines())
text_file = open('mail.log', 'w')
text_file.write(text)
text_file.close()
ssh.close()

with open('mail.log') as f:
    for line in f:
        try:
             .... regex stuff....

Answer 1

text是包含数据的字符串。你无法打开它。而不是打开它，你应该只是循环它

for line in text.splitlines(): 
    try:
         .... regex stuff....

Answer 2

您可能希望从标准库中查看StringIO，这会使字符串看起来或多或少像文件。

或者，你可以说

for line in f.split('\n'):
     try:
        <regex stuff>

Python打开文件错误

2 个答案: