ImportError: nessun modulo denominato sklearn.cross_validation

Question

Sto usando python 2.7 in Ubuntu 14.04. Ho installato scikit-learn, NumPy e matplotlib con questi comandi:

sudo apt-get install build-essential python-dev python-numpy \ 
python-numpy-dev python-scipy libatlas-dev g++ python-matplotlib \ 
ipython 

Ma quando ho importare questi pacchetti:

from time import time 
import logging 
import matplotlib.pyplot as plt 

from sklearn.cross_validation import train_test_split 
from sklearn.datasets import fetch_lfw_people 
from sklearn.grid_search import GridSearchCV 
from sklearn.metrics import classification_report 
from sklearn.metrics import confusion_matrix 
from sklearn.decomposition import RandomizedPCA 
from sklearn.svm import SVC 

mi restituisce questo errore:

ImportError: No module named sklearn.cross_validation 

Che cosa ho bisogno fare?

Answer 1

Assicurarsi di aver installato e quindi create a virtualenv using conda. Ciò garantirà tutte le importazioni funzionano

Python 2.7.9 |Anaconda 2.2.0 (64-bit)| (default, Mar 9 2015, 16:20:48) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux2 
Type "help", "copyright", "credits" or "license" for more information. 
Anaconda is brought to you by Continuum Analytics. 
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>>> from sklearn.cross_validation import train_test_split 

Answer 2

occorre riferirsi al renaming and depreaction of cross_validation submodule to model_selection. Prova a sostituire cross_validation ->model_selection