Circular dependency issue in wasp_grid_site

It looks like there is a circular dependency issue in wasp_grid_site: wasp_grid_site imports ParqueFicticio which import .parque_ficticio which imports wasp_grid_site

>>> from py_wake.site.wasp_grid_site import WaspGridSite
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/pe/git/TOPFARM/PyWake/py_wake/site/wasp_grid_site.py", line 11, in <module>
    from py_wake.examples.data.ParqueFicticio import ParqueFicticio_path
  File "/Users/pe/git/TOPFARM/PyWake/py_wake/examples/data/ParqueFicticio/__init__.py", line 3, in <module>
    from .parque_ficticio import ParqueFicticioSite  # nopep8
  File "/Users/pe/git/TOPFARM/PyWake/py_wake/examples/data/ParqueFicticio/parque_ficticio.py", line 2, in <module>
    from py_wake.site.wasp_grid_site import WaspGridSite
ImportError: cannot import name 'WaspGridSite'