[Python] Ensure producer is keeping the client object alive #11887
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### Motivation Fix #6463. When a producer is created, keep a reference on the client object so that the Python GC will not destroy it. This is similar to what we were already doing for consumer and reader, were we had examples with listeners that need to keep the client/consumer alive. (cherry picked from commit 235e678)
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…1887) ### Motivation Fix apache#6463. When a producer is created, keep a reference on the client object so that the Python GC will not destroy it. This is similar to what we were already doing for consumer and reader, were we had examples with listeners that need to keep the client/consumer alive.
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Motivation
Fix #6463.
When a producer is created, keep a reference on the client object so that the Python GC will not destroy it. This is similar to what we were already doing for consumer and reader, were we had examples with listeners that need to keep the client/consumer alive.