No module named 'sklearn'

Hi

i try to launch scripy python with anaconda 2.4.2 spyder 3.3.1 python 3.5
my code

from sklearn.preprocessing import LabelEncoder, OneHotEncoder
labelencoder_X_1 = LabelEncoder()
X[:, 1] = labelencoder_X_1.fit_transform(X[:, 1])

  File "<ipython-input-5-db3be6994607>", line 1, in <module>
    from sklearn.preprocessing import LabelEncoder, OneHotEncoder

ImportError: No module named 'sklearn'

and i dont can installing this module

an idea
Best regard

Installation module sklearn OK

Thnak you for your help

Best regard