How do you deal with importing built-in libraries under windows using PyCharm?
Question: I have python-2.6 installed and use pycharm-3.1.3 (community edition) to
develop.

But the imports of the built-in libraries (for instance - `datetime`) are
marked as errors by the given IDE.

![enter image description here](http://i.stack.imgur.com/cjyuG.png)

It only happens for built-in libraries, the external ones that are located in
`<pythondir>/Lib` (for instance `base64`) are imported without problems - IDE
can resolve symbols from them for intellisense and whatnot.

So the question is how to deal with this?

PS: I know I can mark it as "ignore this import error" but then the library
symbols won't be autocompleted.


Answer: It happened right after an upgrade from 3.0 to 3.1.x, so probably it's just
some upgrade issue.

The solution is to re-add interpreter. After that all built-in modules are
resolved fine.

