LpProblem.fromMPS() function does not work on UNIX system?
tle4336 opened this issue · comments
Details for the issue
What did you do?
I currently need to read a .mps file back into Pycharm using LpProblem.fromMPS([file directory], sense=Lp.Maximize). However, when doing things on UNIX system in a Docker container (Jenkins), I kept bumping into the weird error:
15:36:40 File "/-python/.local/lib/python3.10/site-packages/pulp/pulp.py", line 1541, in fromMPS
15:36:40 data = mpslp.readMPS(filename, sense=sense, **kwargs)
15:36:40 File "/-python/.local/lib/python3.10/site-packages/pulp/mps_lp.py", line 91, in readMPS
15:36:40 row_name = line[1]
15:36:40 IndexError: list index out of range
What did you expect to see?
I expect the file to be read successfully, as I was able to do so locally on a Windows 10 system.
What did you see instead?
Error message:
15:36:40 File "/-python/.local/lib/python3.10/site-packages/pulp/pulp.py", line 1541, in fromMPS
15:36:40 data = mpslp.readMPS(filename, sense=sense, **kwargs)
15:36:40 File "/-python/.local/lib/python3.10/site-packages/pulp/mps_lp.py", line 91, in readMPS
15:36:40 row_name = line[1]
15:36:40 IndexError: list index out of range
Useful extra information
The info below often helps, please fill it out if you're able to. :)
What operating system are you using?
- Windows: ( version: ___ )
- Linux: ( distro: ___ )
- Mac OS: ( version: ___ )
- Other: UNIX
I'm using python version:
- 2.7
- 3.4
- 3.5
- 3.6
- [X ] Other: 3.10
I installed PuLP via:
- pypi (python -m pip install pulp)
- github (python -m pip install -U git+https://github.com/coin-or/pulp)
- [X ] Other: pipfile (conda?)
Did you also
- Tried out the latest github version: https://github.com/coin-or/pulp
- Searched for an existing similar issue: https://github.com/coin-or/pulp/issues?utf8=%E2%9C%93&q=is%3Aissue%20
you're giving a list of files as argument, from what I get from your example. The package is constantly tested in Linux.
You should do:
LpProblem.fromMPS(file directory, sense=Lp.Maximize)