python - Not able to install packages in Pycharm

Question

I have pycharm community edition(latest stable build) installed on my Ubuntu 16.04 LTS, I am not able to install packages via pycharm, was able to install them before. I can install the packages via pip, but would like to solve this issue.

Below is the Screenshot of the problem

Have googled for this issue, but could not find any fix, I have a windows machine and it does not face the same issue.

Answer 1

I have got a solution, i reffered to https://youtrack.jetbrains.com/issue/PY-20081#u=1468410176856.

Here they have tried to add https://pypi.python.org/pypi as a repository.

To add it as a repository,

1.) Go to Settings
2.) Project interpreter
3.) Click the + sign on top right edge
4.) Go to manage repositories, 
5.) Press the + Sign, then add https://pypi.python.org/pypi
6.) Press Ok

Now all the packages should load.

Thanks Hami Torun & Simon, I was able to solve it by luck.