Incoherent interpretation of members of U_

[cgosorio]

I am still trying to understand the code, so maybe I am wrong, but I think there is something wrong in the interpretation of the members of U_ and the elements in variables uand p in classifiers.py.

In lines 124 and 125:

sklearn_cotraining/sklearn_cotraining/classifiers.py

Lines 124 to 125 in 29a29a2

	y[[U_[x] for x in p]] = 1
	y[[U_[x] for x in n]] = 0

the elements of n and p are used as indices to access specific elements of U_, but in line 130:

sklearn_cotraining/sklearn_cotraining/classifiers.py

Line 130 in 29a29a2

U_ = [elem for elem in U_ if not (elem in p or elem in n)]

the elements of n and p are used as if they were to appear as members of U_. I think there is an error there.