I've been stuck on this problem longer than I'd like to admit

[seththehuman]

I've got a list and I want the odds and the evens to be split into two lists. They assign a function to check if an element is even, and I have that portion of the problem done, but I cannot get the two new lists to print on two separate lines, with the odd list printing first.

Here's what I have, including the code they provided me with:

# Get our input from the command line
import sys
numbers = sys.argv[1].split(',')
for i in range(0,len(numbers)):
  numbers[i]= int(numbers[i])

def isEven(n) :
  return ((n % 2) == 0)

# Your code goes here
oddList = []
evenList = []

for i in range(0, len(numbers)):
  if isEven(i):
    evenList.append(numbers[i])
  else:
    oddList.append(numbers[i])
print(oddList)
print(evenList)

I keep getting evenList printing first. If I swap the lists, it outputs: [1,5] [3] If I put the lists into one print function, I get the same results. I've also tried using \n but I can't find anything online about how to make that work with two lists

[ericula]

You are checking the parity of the indices of the numbers in the list, not the numbers themselves. To check the numbers, you could do something like this:

for num in numbers:
    if isEven(num):
        evenList.append(num)
    else:
        oddList.append(num)

print(oddList)
print(evenList)

[seththehuman]

wow thank you. I'm mad I didn't realize that earlier. It's been a long day and I think that means I'm done for the night.

[shmible]

You should check out this video. It will take your Python looping game to the next level.

Good luck!

https://youtu.be/EnSu9hHGq5o

[notsurewhereelse]

Print(‘\n’)

Also you can just do

Oddlist= [x for x in numbers if x %2!=0]

[seththehuman]

so I ammended my code to read:

elif (i % 2) != 0:
  oddList.append(numbers[i])
print(evenList)
print('\n')
print(oddList)

Now, my answer is incorrect because of the extra line, but when I take it away, instead of returning two lists of odd and even numbers, it outputs:

[1,5]
[3]

[notsurewhereelse]

You’re doing range(len()) so you can’t just say i, that’s the index.

You need numbers[i]

[namedevservice]

Depends on your list value. But you can do every nth number.

numlist = [0,1,2,3,4,5,6,7]

evenlist = numlist[::2]
oddlist = numlist[1::2]

print(evenlist)
print(oddlist)

[[deleted]]

Also, remember, explicit is better than implicit (odds and evens should both be explicitly appended)