最大子序列的查找的python 实现

#coding:utf-8
#py2.7

def findmaxsubstr(nums):
	bufs={}
	for i,num in enumerate(nums):
		if i==0:
			bufs[i]=num
		else:
			bufs[i]=bufs[i-1]+num if bufs[i-1]>=0 else num
	print bufs
	b=max([(bufs[i],i) for i in bufs.keys()])
	print b
	rs=[]
	for i in range(b[1],-1,-1):
		if bufs[i]>=0:
			rs=[nums[i]]+rs
		else:
			break
	if len(rs) == 0:
		return [max(nums)]
	else:
		return rs

print findmaxsubstr([-1,-2,-3,4,5,7,-12,89,-12,33,-99,1,-23,0,55])