'finally' suite not invoked in generator function

[gitlab-importer]

In Heptapod by bitbucket_importer on Jun 3, 2011, 12:07

Created originally on Bitbucket by JonasH (Jonas Hunkemoeller)

From (bugs.pypy.org)

[gitlab-importer]

In Heptapod by bitbucket_importer on Jun 3, 2011, 12:07

Created originally on Bitbucket by JonasH (Jonas Hunkemoeller)

Consider this code sample:


def g():
    try:
        yield 1
    finally:
        print 'finally'

g().next()

CPython behaves differently from PyPy:

$ python2.7 asd.py 
finally
---
$ pypy asd.py
---

The finally suite is executed only if the generator is exhausted in such way 
that StopIteration is raised.

[gitlab-importer]

In Heptapod by bitbucket_importer on Jun 3, 2011, 12:11

Created originally on Bitbucket by antocuni (Antonio Cuni)

The finally is printed when the generator object is garbage collected.
Since CPython has reference counting, the generator is collected immediately,
while on PyPy is not.

If you add "import gc; gc.collect()" at the end of the script, the "finally" is
printed also on Pypy

[gitlab-importer]

In Heptapod by bitbucket_importer on May 14, 2015, 11:08

Created originally on Bitbucket by antondries (Anton Dries)

Issue #2047 was marked as a duplicate of this issue.