Adventures in Computational Chemistry

This script allows one to exchange two columns in a file.And it do so for all the files in a directory. The python script is : ---------------------------- #script to read and execute column exchange for all files in the directory import os listing=os.listdir(" /home/K/Documents/PY/column_exchange ") for infile in listing:  print infile  if infile !="column_interchange_script.py":   fi=open(infile).readlines()   fo=open(infile +'_output','w')   space="   "   for line in fi:    first,second=line.split()    fo.write('%s%s%s\n'%(second,space,first))  else:    print "This is not interesting file"     ----------------------------------------------------    Some expert might simplify it a lot more, but for new python user like me, this is a big leap. So, how does it work: Create a directory where in all the files for which column exchange need to be done are stored. Kee...