*cute_py<os.walk,os.listdir,os.stat>

import sys,os

def get(path):
    allfile = {}
    for root,dirs,files in os.walk(path):
        for onefile in files:
            fname = os.path.join(root,onefile)
            fsize = os.stat(fname).st_size
            if allfile.has_key(fsize):
                allfile[fsize].append(fname)
            else:
                allfile[fsize] = [fname]
    fsize_key = allfile.keys()
    fsize_key.sort()
    result = []
    for x in fsize_key:
        for y in allfile[x]:
            t = (x,y)
            result.append(t)
    for x in range(1,4):
        print result[-x]
    #return result[-3:]
                
if __name__ == '__main__':
##    if len(sys.argv)==1:
##        print 'no good path'
##    else:
##        path = os.path.abspath(sys.argv[1])
##        if not os.path.isdir(path):
##            print "%s is not exist" % path
##        else:
##            top = get(path)
##            for (s,f) in top:
##                print '%s ---> %s' % (f,s)
    top = get(r'C:\Users\eth1\Desktop\temp')
    #for k in top:
        #prinit "%s -- %s" % (k[1],k[0])

os.listdir(path) --> 

os.stat(file).st_size --> size

os.walk(path) --> 

sys.argv[0] --> file address