python实现数组区间合并

def merge(lists):
  list.sort(key=lamba x: x[0])
  merges = []
  for l in list:
    if not merges or l[0] > merges[-1][1]
        merges.append(l)
    else:
        merges[-1][1] = max(l[1], merges[-1][1])
return merges