rename_file.py

#!/usr/bin/python
import os
import sys
argvs = sys.argv
argc = len(argvs)
if (argc != 4):
    print "Usage $ python %s beg_time end_time pud_digit" % argvs[0]
    quit()
beg_time = int(argvs[1])
end_time = int(argvs[2])
digit    = int(argvs[3])
for time in range(beg_time,end_time+1):
    os.rename('time' + str(time).zfill(digit) + '.jpeg', 'time' + str(time-beg_time).zfill(digit) + '.jpeg')