[英]Sum up numbers close to a specific number in a list
示例 1
List = [12,40,30,53,82,31,100]
我想生成一个列表,其中包含许多接近 80 且不大于 80 的数字。 如果数字原本大于 80 就通过。
结果像[52,30, ,53,82, 31,100]
因为[12+40,30,53,82,31 ,100]
示例 2
List =[45,102,31,25,2,99]
Result = [45,102,58,99]
请帮我弄清楚如何用这个问题编码,真的很感激。
我试过了
For i in range(len(List)):
尝试这个:
start = -1
sum_ = 0
List = [45,102,31,25,2,99]
result = []
i = 0
while i < len(List):
if start == -1:
start = i
new_sum = sum_ + List[i]
if new_sum > 80:
result.append(sum_)
start = -1
sum_ = 0
new_sum = 0
if List[i] > 80:
result.append(List[i])
i += 1
continue
else:
sum_ = new_sum
i += 1
print(result)
# [45, 102, 58, 99]
您可以定义简单的生成器函数,如果它们达到限制,它将产生值的总和:
def sum_up_to(source, limit):
summ = 0
for i in source:
if summ + i > limit:
if summ:
yield summ
summ = i
else:
yield i
summ = 0
else:
summ += i
if summ:
yield summ
然后用任何限制调用它:
src1 = [12, 40, 30, 53, 82, 31, 100]
dst1 = list(sum_up_to(src1, 80)) # [52, 30, 53, 82, 31, 100]
src2 = [45, 102, 31, 25, 2, 99]
dst2 = list(sum_up_to(src2, 80)) # [45, 102, 58, 99]
List =[45,102,31,25,2,99]
# List = [12,40,30,53,82,31,100]
result = []
for i in range(0,len(List)):
if List[i]>=80 or len(result)==0:
result.append(List[i])
elif result[-1] + List[i] <=80 :
result[-1] += List[i]
else :
result.append(List[i])
print(result)
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