`print`/`PrintCollector` not behaving as expected

## PROBLEM REPORT The `PrintCollector` does not seem to collect prints that happen inside function definitions. ### What I did: When you execute this code: ``` source_code = """def do_something(): print("function called") print("foo") return math.sqrt(2) print(do_something()) print(math.sqrt(4)) print("hello") """ ``` and capture the value of `printed` in the end, it's just ``` 1.4142135623730951 2.0 hello ``` and not ``` function called foo 1.4142135623730951 2.0 hello ``` as I would expect. When I modify the code to check the `printed` value after each `print`, it seems the collector does indeed collect the values, but then forgets them again (maybe it's re-instantiated?): ``` ['function called\n', 'function called\nfoo\n', '1.4142135623730951\n', '1.4142135623730951\n2.0\n', '1.4142135623730951\n2.0\nhello\n'] ``` You can find my entire sample code here: https://gist.github.com/epistoteles/f09311702fa06679a4ff64aca2790081 ### What I expect to happen: Prints get collected as they would when you execute the Python code normally and don't randomly "reset" midway. ### What version of Python and Zope/Addons I am using: Python 3.11