HI all, How can I built matrix by reading whole files.I just need two things from file that enzyme code and E VALUES scores. Both characters are in two columns in 1000 lines. for this I wrote this code but it is not working.

f=open("output.txt")
data=f.readlines()
label=1
label_dictionary = {}
for lines in data:
        print lines,
        columns= lines.split()
        print columns
        if columns [1] not in label_dictionary:
           label_dictionary[columns[1]]=label
           label=label+1
           if  columns [-1] not in label_dictionary:
               label_dictionary[columns[-1]] = label
               label=label+1                   
               print label_dictionary

               print label_dictionary,[columns[1]],label_dictionary,[columns[-1]]