Question

I’m stuck on python2.4, so I can’t use a finally clause with generators or yield. Is there any way to work around this?

I can’t find any mentions of how to work around this limitation in python 2.4, and I’m not a big fan of the workarounds I’ve thought of (mainly involving __del__ and trying to make sure it runs within a reasonable time) aren’t very appealing.

Answer 1

You can duplicate code to avoid the finally block:

try:
  yield 42
finally:
  do_something()

Becomes:

try:
  yield 42
except:  # bare except, catches *anything*
  do_something()
  raise  # re-raise same exception
do_something()

(I’ve not tried this on Python 2.4, you may have to look at sys.exc_info instead of the re-raise statement above, as in raise sys.exc_info[0], sys.exc_info[1], sys.exc_info[2].)