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There is a red line below sys and time, I am using pycharm community edition 4.5.3, it is showing the reason for this error is ' no module named sys ' and same for time. But when i tried to run it, it works perfectly.

What is the reason behind it and will it affect my code in future?

This is something I just ran into with Intellij 2017.3.4 where it could find every module except sys and time in the editor, but everything would run fine. I had both 2.7 and 3.5 version of python and it did not seem to matter which one I selected as the SDK. I tried adding and removing them.

When I went to Project Structure -> Platform Settings -> SDKs -> Python 3.5 -> Packages it prompted a warning that Python packaging tools not found. and had an install link. I installed it and the editor no longer complained about sys and time. When I switched SDKs to 2.7 (without installing the packaging tools) it complained again.

So I am not exactly sure what is happening that that seemed to fix it for me it other people run into this problem.

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