ArdalanM/pyLightGBM

FileNotFoundError after validation

Opened this issue · 6 comments

KazukiOnodera commented

I got the error after validation.
Here is the code.

import pandas as pd
from sklearn.datasets import load_diabetes
from sklearn.model_selection import train_test_split
from pylightgbm.models import GBMClassifier
from sklearn.metrics import roc_auc_score

diabetes = load_diabetes()

split_ind = 200

X = diabetes['data']
y = diabetes['target']

X = pd.DataFrame(X).add_prefix('c')
y = pd.Series(y)
y = (y>150)*1

X_train, X_test = X[:split_ind], X[split_ind:]
y_train, y_test = y[:split_ind], y[split_ind:]

exec = "~/LightGBM/lightgbm"

clf = GBMClassifier(exec_path=exec, 
                    num_iterations=3000,
                    metric='auc',
                    early_stopping_round=20)

clf.fit(X_train, y_train, 
        test_data=[(X_test, y_test)])
clf.param['num_iterations'] = clf.best_round # Also .set_params wouldn't work
clf.fit(X_train, y_train)

The second 'clf.fit' occurs 'FileNotFoundError: [Errno 2] No such file or directory: '/var/folders/~', since in 'def fit' the 'with process.stdout:' does not write LightGBM_model.

ekerazha commented

Same error when using early_stopping_round and test_data.

ArdalanM commented

For the time being, you should re create the model each time you want to use it. Hope to fix this soon.

Thanks for the feedback guys,

ArdalanM commented

@KazukiOnodera, what is your OS ?
I ran your example (just changed path to lightgbm) and it works (I am on Ubuntu).

KazukiOnodera commented

I'm on OSX(mac).

zhengz3000 commented

I am on Win 10, I found the same error "'FileNotFoundError: [Errno 2] No such file or directory"