I have a txt file to which i want to split on the basis of new line. i write code then find error in it and help me. code is
 file = open("C:/Python26/trigram.txt");
 f = open("Prefix.txt",'w');
 f_up = open("Prefix.txt",'w');
 contents=file.read();
 tokens = nltk.word_tokenize(contents);
 for t in tokens:
     print t
my file looks like this:
IL-2$gene$expression$and
IL-2$gene$expression$and$NF-kappa
IL-2$gene$expression$and$NF-kappa$B
IL-2$gene$expression$and$NF-kappa$B$activation
gene$expression$and$NF-kappa$B$activation$through
expression$and$NF-kappa$B$activation$through$CD28
 
    