python编程，同志们给个完整程序叭
def sum_missing_numbers(a):
a.sort()
sum = 0
for i in range(a[0]+1, a[len(a)-1]):
if i not in a:
sum += i
return sum
def sum_missing_numbers(a):
a.sort()
sum = 0
for i in range(a[0]+1, a[len(a)-1]):
if i not in a:
sum += i
return sum