# List structure in Python

Hi all,

I am just trying basic python to find prime numbers between a range (lower and upper). But I couldn’t quite get the output in the form of list levels… I want the output lists (prime nums, count, sum) to be nested lists of the same lengths.

``````lower = IN[0]
upper = IN[1]
prime_num = []

for l,u in zip(lower, upper):
for num in range(l, u+1):
if num > 1:
for i in range(2, num-1):
if num % i == 0:
break
else:
prime_num.append(num)

OUT = prime_num, len(prime_num), sum(prime_num)
``````

actually it was not solved… maybe you can load the packages

1 Like

Thanks for linking the topic. Here I am just focusing on trying to manage my output lists into sublists instead of getting prime numbers.

After struggling a while, I was able to achieve it.

``````def tolist(input):
result = input if isinstance(input, list) else [input]
return result

lower = tolist(IN[0])
upper = tolist(IN[1])
prime_list = []

for l,u in zip(lower, upper):
prime_num = []
for num in range(l, u+1):
if num > 1:
for i in range(2, num-1):
if num % i == 0:
break
else:
prime_num.append(num)
prime_list.append(prime_num)

p_count = []
p_sum = []

for i in prime_list:
p_count.append(len(i))
p_sum.append(sum(i))

OUT = prime_list, p_count, p_sum
``````
1 Like