Problem installing

[thoppe]

On a stock install of Ubuntu 12.10/numpy the installation

python setup.py build
sudo python setup.py install

works, but running the demo

python Demo/compute_gr.py

fails with

Traceback (most recent call last):
  File "Demo/compute_gr.py", line 4, in <module>
    from pyljfluid.components import (LJForceField, Config, MDSimulator,
  File "/usr/local/lib/python2.7/dist-packages/pyljfluid/__init__.py", line 29, in <module>
    from components import *
  File "/usr/local/lib/python2.7/dist-packages/pyljfluid/components.py", line 27, in <module>
    from base_components import (NeighborsTable, BaseForceField, LJForceField, BaseConfig,
ImportError: cannot import name BaseForceField

[peliti48]

Exactly the same problem with Canopy under Mavericks:

$ python Demo/compute_gr.py
Traceback (most recent call last):
File "Demo/compute_gr.py", line 4, in
from pyljfluid.components import (LJForceField, Config, MDSimulator,
File "/Users/luca/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/PyLJFluid-0.0.1-py2.7-macosx-10.6-x86_64.egg/pyljfluid/init.py", line 29, in
from components import *
File "/Users/luca/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/PyLJFluid-0.0.1-py2.7-macosx-10.6-x86_64.egg/pyljfluid/components.py", line 27, in
from base_components import (NeighborsTable, BaseForceField, LJForceField, BaseConfig,
ImportError: cannot import name BaseForceField

[jpetersen48]

Hopefully it isn't rude to comment on a multi-year old thread like this, but the problem is in a mislabelled variable in pylfjluid/components.py

To fix it, before running setup.py, you should go into pyljfluid/components.py and on lines 27 and 37, change BaseForceField to BasePyForceField. If you have already run the setup, the same fix will work, just be sure to go to /lib/python2.7/site-packages/pyljfluid/components.py and make the change there.