one hot encoder: how to encode multible value of same category?

Question

I am going to predict the box office of a movie. Assuming that there is only one categorical feature "actors" with values "A","B","C".And I enocde them as [1,0,0],[0,1,0],[0,0,1],what if the movie has multiple actors,for example both A and B, should I encode it as [1,1,0] or [1,0,0,0,1,0]

Answer 1

you should represent each as integers and or them together

A=int("100",2)
B=int("010",2)
C=int("001",2)
print A,B,C
movie = A|B
print movie
print bin(movie)