lxml Error

lxml Error

smpat 12 Jul 2013 12:13

Thanks to Andris, I was able to successfully make Exciting in my online account. However, I am now encountering a problem that has arisen on every Linux machine I've attempted to install Exciting on. When I attempt the "General Lattice Optimization" tutorial, the command OPTIMIZE-lattice.py returns

File "/home/user/exciting/excitingscripts/OPTIMIZE-setup.py", line 28, in <module>
from lxml import etree as ET
ImportError: No module named lxml

When I change "lxml" to "xml" in OPTIMIZE-setup.py, I am able to begin the tutorial to the point of choosing the parameter to vary. When I select a parameter, the error is given as

Please choose '1' or '2': 2
Traceback (most recent call last):
File "/home/user/exciting/excitingscripts/OPTIMIZE-setup.py", line 216, in <module>
doc = ET.parse(INOBJ)
AttributeError: 'module' object has no attribute 'parse'

I've never found a solution to this problem and would appreciate any input provided

Sean

Robert N (guest) 12 Jul 2013 13:28

I can't give you a solution yet Sean, but I can point out that in checking lxml to xml you have changed the specification of a library(lxml) to a file format/language(xml). So it is not surprisingly at all that this did not help.

www.lxmlDOTde

smpat 12 Jul 2013 13:34

Yes, it was more of just a bumbling attempt to get somewhere, as I've read about this as a workaround before. Programming is not something I'm trained in or very comfortable with, I'm just trying to survive these setbacks (with any help I can get!) so that I can successfully resume calculations.

Robert N (guest) 12 Jul 2013 13:39

I'm going to point out something that might be obvious, but have you considered that you don't have the lxml libraries installed? You may inquire with your HPC help desk if they have those installed. I doubt (although I could be wrong) that exciting comes with it.

Best,

Robert

smpat 12 Jul 2013 13:49

At this point, I'm relatively confident that you're correct about that. I'm trying to understand if there is an alternative that would allow me to continue, or if I absolutely must install them.

Although, I did install the lxml libraries on my Ubuntu machines, and encountered the same error. Actually, to correct myself, I attempted to install them and was told that they were already installed with no updates needed.

Sean

Robert (guest) 12 Jul 2013 16:46

Sean,

I believe your HPC help desk should be able to resolve this issue. Give them a call and let us know of the resolve. They might be able to point out why your ubuntu machine is not locating the installed library as well.

smpat 12 Jul 2013 21:23

I've spoken with the HPC help desk and we do not have lxml installed. They are looking into it, so I guess I'll report back when I hear something. If anyone has any other solutions, I would very much appreciate them.

Robert N (guest) 14 Jul 2013 17:38

install yourself?