Error: IndexError:list out of range

[b10803022]

when i am executing the following code i m getting IndexError:list out of range

import os;
import sys;
file1=open(sys.argv[1],"r").readlines() # 1_train.txt
file2=open(sys.argv[2],"w")
for i in range(0, len(file1)):
	w=file1[i].split();
 	if(len(w)==3):
		file2.write(w[0]+"_"+w[2]+"\t"+w[1]+"\n");
	else:
		file2.write("\n");

[bvdet]

It would be helpful if you posted the complete traceback. My initial thought is you only gave it one argument. You can add print statements at strategic places to see what is taking place.

It would be more concise to iterate on the file object instead of a range. Something like:

file1=open(sys.argv[1],"r")
for line in f:
    w=line.split()
    ................