Code0x58 commented on pull request #3598:
URL: https://github.com/apache/incubator-heron/pull/3598#issuecomment-678482025
Thanks @huijunwu! I just pushed a change to avoid triggering that existing
issue, which hopefully wasn't causing anything or relied on.
An example of what causes that `RuntimeWarning`:
```
$ tree
.
└── a
├── b.py
└── __init__.py
$ cat a/__init__.py
print("import a")
from . import b
$ cat a/b.py
print("import b")
if __name__ == "__main__":
print("run b")
$ python -m a.b
import a
import b
/usr/lib/python3.8/runpy.py:126: RuntimeWarning: 'a.b' found in sys.modules
after import of package 'a', but prior to execution of 'a.b'; this may result
in unpredictable behaviour
warn(RuntimeWarning(msg))
import b
run b
```
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