I am using eclipse for python. 
  How do I import an existing project into eclipse in the current workspace.
Thanks
After following steps outlined by @Shan, if the folders under the root folder are not shown as packages, 

Right-click on the root folder in PyDev Package Explorer
Select PyDev > Set as source-folder

It will add the root folder to the PYTHONPATH and now the folders will appear as packages
How do I import a pre-existing python project into Eclipse?