ok, you're not using them as class level vars, so here is what your Node class should look like:

class Node:
  
    def __init__(self,name='',infected=False,targets=None):
        if targets is None: targets=[]
        self.name = name
        self.infected = infected
        self.targets = targets

... :/

no random tests.

You should read those:

• https://github.com/codewars/codewars.com/wiki/Kata-Creator
• https://github.com/codewars/codewars.com/wiki/Tutorial%3A-Create-Your-First-Kata

Hi,

I didn't try it yet, but the either the description of the Node class is wrong, or your class implementation is wrong:

class Node:
  targets = []
  name = ''
  infected = False

  def __init__(self, name, infected): 
    self.name = name
    self.infected = infected

• first, don't use instance and class fields with the same name (...if! there are class fields...?)
• declared that way, Node.targets is a class level attribute, hence the very same for every Node instance. Which is in contradiction with this:

Starting at day 0, anybody who is infected will infect any and all vertices in their 'targets' list.

=> ??

WTF is _b Puzzle Club ?!?

Today's exercise is simple. But it's explained with difficulty at best. The requirements are unclear: "chaining" is not explained ( an external link does not cut it ), as mentioned below, the way to divide up the numbers is only hinted at, and the juggling with data types is also made more difficult than it actually is.

Also, the Example tests are inadequate, and empty arrays should be [], not null. Why are they arrays anyway, and not Sets? They should behave as Sets, they might as well be Sets.

There's more than 1 way to split numbers into groups, any permutation is equally valid.
"Awesome powers of prime numbers" don't have anything to do with the task, it could be any other number in this context.

• Issue with TS boilerplate code

 TSError: ⨯ Unable to compile TypeScript:
 test.ts:1:20 - error TS2305: Module '"./solution"' has no exported member 'TreeNode'.

• No sample tests in typescript.

This is a duplicate of more general duplicate.

the name of the property holding the value isn't specified (the user is forced to make an assumption that it's node.key)

No random tests.