Error on Pycharm
Answered
I installed Gurobi on my Mac machine and used Conda to install Gurobi setup.py file. I am able to call Groubi and solve models sometimes; however, an error keeps showing sometimes after solving the model and other times before:
import gurobipy as gp
from gurobipy import GRB
from gurobipy import Model
m = Model('model')
### Output ###
Using license file /Users/BasemAlkhaleel/gurobi.lic
Academic license - for non-commercial use only
Traceback (most recent call last):
File "/Users/BasemAlkhaleel/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/193.6015.41/PyCharm.app/Contents/plugins/python/helpers/pydev/_pydevd_bundle/pydevd_thrift.py", line 274, in frame_vars_to_struct
value = var_to_struct(v, str(k), evaluate_full_value=eval_full_val)
File "/Users/BasemAlkhaleel/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/193.6015.41/PyCharm.app/Contents/plugins/python/helpers/pydev/_pydevd_bundle/pydevd_thrift.py", line 358, in var_to_struct
elif hasattr(v, '__len__') and not is_string(v):
File "model.pxi", line 344, in gurobipy.Model.__getattr__
KeyError: '__len__'
Unexpected error, recovered safely.
I hope someone could help me on this topic.
-
Official comment
This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?. -
Could you give us some additional information:
- How exactly did you install the Gurobi Python package? Did you use conda ("conda install gurobi") or did you install it using setup.py (e.g. "python setup.py install")?
- Where do you get this error? Do you only get it in PyCharm or also using the interactive shell?
0 -
- I used python setup.py install
- I get the error using the python console inside Pycharm; however, if I run the file through a Jupyter notebook or through "Run" command in Pycharm I don't get the error. My python environment is managed through anaconda.
0 -
I had a similar error, but only when I was in debug mode in pycharm. In my case, gurobi is installed on linux. I have run many of the python examples successfully provided I don't try to set breakpoints.
Connected to pydev debugger (build 193.6494.30)
Using license file /home/jeff/local/gurobi/gurobi.lic
Traceback (most recent call last):
File "/mnt/b06cb29c-6a92-4382-ad49-9dd8e02b4c7e/home/jeff/.pycharm_helpers/pydev/_pydevd_bundle/pydevd_xml.py", line 282, in frame_vars_to_xml
xml += var_to_xml(v, str(k), evaluate_full_value=eval_full_val)
File "/mnt/b06cb29c-6a92-4382-ad49-9dd8e02b4c7e/home/jeff/.pycharm_helpers/pydev/_pydevd_bundle/pydevd_xml.py", line 369, in var_to_xml
elif hasattr(v, "__len__") and not is_string(v):
File "model.pxi", line 342, in gurobipy.Model.__getattr__
KeyError: '__len__'
Unexpected error, recovered safely.0 -
Hi,
This behavior will be fixed in the next bugfix release of Gurobi. Thanks for letting us know about it!
In the meantime, a possible workaround is to explicitly set the __len__ attribute of the Model object. E.g.:
model.__len__ = 1
Eli
0 -
That fixed it for me. Thanks for the quick response.
Jeff
0
Post is closed for comments.
Comments
6 comments