vim.command() always throw exception after KeyboardInterrupt

I encounter a critical issue when writing vim script using python, for example the code is as below:

def func():
try:
while 1:
xxx
xxx
except KeyboardInterrupt:
pass

vim.command("xxxx")

I press ctrl-c to interrupt the program, after KeyboardInterrupt is raised, vim.command() always throw an exception，which is KeyboardInterrupt in vim7.3 and vim.error in vim7.4.

I want to use "signal.signal(signal.SIGINT, signal.SIG_IGN)" to ignore SIGINT，but it doesn't work.

Any one knows this issue?

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.