Structuring python projects without path hacks

I have a shared python library that I use in multiple projects, so the structure looks like this:

Project1
    main.py <--- (One of the projects that uses the library)
...
sharedlib
    __init__.py
    ps_lib.py
    another.py

Now in each project's main.py I use the following hack to make it work:

import os
import sys
sys.path.insert(0, os.path.abspath('..'))

import sharedlib.ps_lib
...

Is there a way to do it without using this hack? Or is there a better way to organize the projects structure?