I am trying to get matplotlib to work under Windows 7 (64-bit) using Python 2.7 and Eclipse with the PyDev plugin . I installed NumPy from http://www.lfd.uci.edu/~gohlke/pyt
Works for me. Very probably you have added matplotlib and numpy directories to your PYTHONPATH, such that matplotlib.collections is imported instead of the collections module from the Python standard library. Try remove matplotlib and numpy directories from the PYTHONPATH in the Eclipse > PyDev > Python interpreter settings.