import sys def readLines(fname): try: ls=[] f=open(fname,'r') li=str(f.read()) for i in li: if i=='A': ls.append('1,0,0,0') elif i=='G': ls.append('0,1,0,0') elif i=='C': ls.append('0,0,1,0') elif i=='T': ls.append('0,0,0,1') cell='{'+repr(ls)[1:-1]+'}' f.close() print (cell) except IOError: print ("Can't open file "+fname) if '__main__'==__name__: if len(sys.argv)<2: print ('No file specified.') sys.exit() else: readLines(sys.argv[1])