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Prevent classes like:

Browse source 
class RunSelfFunction(object):
        def __init__(self):
            self.thread = threading.Thread(target=self._run)
            self.thread.start()
        def _run(self):
            pass
from creating a permanent cycle between the object and the thread by having the
Thread delete its references to the object when it completes.

As an example of the effect of this bug, paramiko.Transport inherits from
Thread to avoid it.
This commit is contained in:
Jeffrey Yasskin 2008-02-23 19:40:54 +00:00
parent 1beea27299
commit 3414ea9ed9
2 changed files with 23 additions and 0 deletions
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3
Lib/threading.py
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@ -444,6 +444,9 @@ class Thread(_Verbose):
def run(self):
if self.__target:
self.__target(*self.__args, **self.__kwargs)
# Avoid a refcycle if the thread is running a function with an
# argument that has a member that points to the thread.
del self.__target, self.__args, self.__kwargs
def __bootstrap(self):
# Wrapper around the real bootstrap code that ignores