Implementing a recursive algorithm for tree.

[Negativ3]

Hi Thanks for replying,
I'm learning how to use BBcode
I can't make the max_profit function to work,
The map is giving problem, It was supposed to take a function as a first argument and iterable as another,
but Its giving a error as:

Error:
Traceback (most recent call last):
  File "f:\coding n stuffs\asdfasda.py", line 97, in <module>
    y = tree.max_profit(1)
  File "f:\coding n stuffs\asdfasda.py", line 65, in max_profit
    return max(-x,self[identifier] + sum(map(max_profit, self[identifier].children)))
NameError: name 'max_profit' is not defined

PS F:\coding n stuffs>

sorry for not formatting I'm going through the help page to learn bbcode.