IPython ImportError: cannot import name Layout

Question

I'm trying CatBoost based on this article

In it's code, CatBoost has plot in model.fit(), so I want to try it on my IPython.

Here's my CatBoost code:

from catboost import CatBoostRegressor

# indicate categorical features for CatBoost
categorical_features_indices = np.where(X.dtypes != np.float)[0]

model=CatBoostRegressor(iterations=50, depth=3, learning_rate=0.1, 
loss_function='RMSE')
model.fit(X_train, y_train, 
cat_features=categorical_features_indices,
          use_best_model=True,
          eval_set=(X_validation, y_validation), plot=True)

But, it cannot show any plot and kept giving me error:

I did install ipywidgets and ipython. Do you know how to deal with this problem?

Are you running ipython as a notebook or shell? Are you running it in a virtual environment? — Oluwafemi Sule, Aug 16 '17 at 07:48
I run it as notebook. I tried both virtual environment and non-virtual environment, both got this error — Cherry Wu, Aug 16 '17 at 17:42

Cherry Wu · Accepted Answer · 2017-09-04T01:54:15.553

Finally, I solved the problem, and now I can see this plot

In my case, the solution is to install Conda and create a conda virtual environment, then install ipywidgets through Conda. Let me write down all the details here, hope it will help. This may only help Mac users

Download Conda here: https://www.continuum.io/downloads
Add conda into $PATH: How to run Conda?
Create Conda virtual environment conda create -n yourenvname python=x.x anaconda
Activate conda virtual environment source activate yourenvname
Install IPython Notebook in this virtual environment (if you have already user python virtualenv and installed IPython for that, you can skip this step):
- (yourenvname)$ pip install jupyter
- (yourenvname)$ pip install ipykernel
- (yourenvname)$ python -m ipykernel install --user --name testenv --display-name "Python2 (yourenvname)", if you have multiple ipykernel, here testenv should also be changed to another name
Install ipywidgets, (yourenvname)$ conda install ipywidgets --no-deps
Install catboost, (yourenvname)$ pip install catboost
Turn on Jupyter Notebook, jupyter notebook and create a new notebook under Python2 (yourenvname), then it should work

NOTE: If doesn't work, before step 8, try this:

pip install widgetsnbextension
jupyter nbextension enable --py widgetsnbextension --sys-prefix

IPython ImportError: cannot import name Layout

1 Answers1