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Mon Jun 13 13:48:31 CEST 2005 · http://mail.python.org/pipermail/python-dev/2005-June/054182.html

Skip writes:
> Even an apparently simple variable can have side effects [...] Consider
> the builtin help object.  Type it at the prompt with no parens.

I tried. As far as I can tell, the result (in the interactive interpreter)
is the same as with any other object except None: the _ variable gets set,
the interpreter prints out the __str__ of the object, sets the _ variable,
and prints a new '>>>' prompt. It happens that the __str__ of the help
object is:
'Type help() for interactive help, or help(object for help about object.'

... but if there's some side effect going on here, I don't see it. What
am I missing?

-- Michael Chermside

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[Python-Dev] Multiple expression eval in compound if statement?