picRename

import os,re,time
folder1 = '/root/python/picA'
folder2 = '/root/python/picB'
Dicta = {}
Dictb = {}
for path, subdirs, files in os.walk(folder1):
    for name in files:
        Dicta[time.ctime(os.path.getmtime(os.path.join(path, name)))] = os.path.join(path, name)
for path, subdirs, files in os.walk(folder2):
    for name in files:
        Dictb[time.ctime(os.path.getmtime(os.path.join(path, name)))] = os.path.join(path, name)
for name in Dicta:
   if name in Dictb:
       #print Dicta[name]+' => '+os.path.dirname(Dicta[name])+'/'+os.path.split(Dictb[name])[1]
       os.rename(Dicta[name],os.path.dirname(Dicta[name])+'/'+os.path.split(Dictb[name])[1])
print "Complete"


# Ref.
#http://www.tutorialspoint.com/python/python_dictionary.htm
#http://docs.python.org/release/2.5.2/lib/typesmapping.html
#http://stackoverflow.com/questions/2909975/python-list-directory-subdirectory-and-files