facebook/tornado — pull request #536 by evanj (2012-06-14 19:37:55+00:00)
Title: Documentation fixes: auto-reloading

I just got bitten by a bug where I was running python -u (my app) to avoid print statements from getting buffered into pipes. I was mystified about why the output disappeared after Tornado reloaded my code ... until I saw that it re-execs Python. I worked around this by using the PYTHONUNBUFFERED env var, but some additional documentation would prevent me from running into this.