import itertoolsfor i in itertools.permutations('0123456789',4): print ''.join(i)百度审批是SB 不解释。。这下子格式可以了吧
for i in range(10000): print(str(i).zfill(4))
for i in range(10000): print(f'{i:04}') # python 3.6+
for i in xrange(0,10000): print '%04d' % i,