if check == 'd':
del m[raw_input('please input key:')]
print '(D) currtent length:',len(m)
if check == 's':
print '(S) currtent length:',len(m)
f = file(myfriendfile,'w')
cp.dump(m,f,-1)
f.close()
if check == 'se':
m[raw_input('please input key:')].say()
print "I'm looking for you..."
if check == 'show':
f = file(myfriendfile)
m = cp.load(f)
print '------------------ show ------------------'
for key,value in m.items():
value.say()
print '------------------ over ------------------'
f.close()